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Huawei ADSL2+Broadband Router Aolynk DR814, Руководство пользователя

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User Manual 
Aolynk DR811/DR814 ADSL2+Broadband Router 

4  Web-based Management

 

34 

 

Figure 4-25 

Delete trigger 

Click the 

 button to delete this trigger. 

4.11  IDS 

The IDS Settings protect your network from the following kinds of attacks: 

l

 

DOS (Denial of Service). 

l

 

Port Scanning. 

l

 

Web Spoofing. 

IDS  also  implements  blacklisting.  This  stops  external  hosts  that  try  to  attack  the 

network from accessing your device for a specific time limit. 

Click 

Security 

in the Main menu and choose the 

IDS 

tab in the Main Frame to open the 

Firewall Configure Intrusion Detection

 page. 

Содержание ADSL2+Broadband Router Aolynk DR814

Страница 1: ...HUAWEI Aolynk DR811 DR814 ADSL2 Broadband Router User Manual ...

Страница 2: ...chase the products from the sales agent of Huawei Technologies Co Ltd please contact our sales agent If you purchase the products from Huawei Technologies Co Ltd directly please feel free to contact our local office customer care center or company headquarters Huawei Technologies Co Ltd Address East of Liuhe Road Zhijiang Science Park Hangzhou P R China Website http www huawei 3com com Email soho ...

Страница 3: ... Tellwin Inmedia VRP DOPRA iTELLIN HUAWEI OptiX C C08iNET NETENGINE OptiX iSite U SYS iMUSE OpenEye Lansway SmartAX infoX TopEng are trademarks of Huawei Technologies Co Ltd All other trademarks mentioned in this manual are the property of their respective holders Notice The information in this manual is subject to change without notice Every effort has been made in the preparation of this manual ...

Страница 4: ... 9 3 1 Accessing the Web Pages 9 3 2 Web Page Layout 11 3 3 Commonly Used Buttons 12 3 4 Testing Your Setup 13 3 5 Default Device Settings 14 4 Web based Management 15 4 1 Quick Setup 15 4 2 WAN Setting 16 4 3 DNS Relay 18 4 4 LAN Setting 19 4 5 DHCP 21 4 6 Route 22 4 7 Security Interface 25 4 8 DMZ Configuration 28 4 9 Security Policy 30 4 10 Trigger 31 4 11 IDS 34 4 12 SNTP 35 4 13 ZIPB 36 4 14 ...

Страница 5: ...ing a PC Connected by USB Port 53 5 2 1 Connecting a Computer to the USB Port by a USB cable 53 5 2 2 Installing the USB Driver 53 5 2 3 Configuring IP Properties on PC Connected by USB Port 56 6 IP Addresses Network Masks and Subnets 57 6 1 IP Addresses 57 6 1 1 Structure of an IP Address 57 6 1 2 Network Classes 58 6 2 Subnet Masks 58 7 Service Configuration 60 7 1 Configuration Overview 60 7 2 ...

Страница 6: ...information is usually downloaded more often than uploaded such as when surfing the web or downloading files The Aolynk ADSL2 router with embedded ADSL2 technology brings up high speed internet access and remote connection features which make it an ideal solution for small businesses and SOHO users DR811 DR814 uses the ATM over ADSL2 technology to communicate with the central office providing the ...

Страница 7: ... on and is working normally Power OFF Power is switched off or fails Diag For factory test only ON ADSL loop is brought UP Blinking Starting up Link OFF ADSL loop is down Blinking Data is being transmitted or received through ADSL Act OFF No data transmission activities present on the link ON USB connection established USB OFF No USB cable connected ON Ethernet link is up Blinking Ethernet interfa...

Страница 8: ...413 Issue 2 ITU G 992 1 AnnexA G dmt ITU G 992 2 G lite ITU G 992 3 ADSL2 ITU G 992 5 ADSL2 Reset 1 Restoring to factory default settings For this purpose you are required to hold down the button for at least 5 seconds 1 3 Features The list below contains the main features of the device which make it excellent for network connections Features include l Internal DSL modem for high speed Internet ac...

Страница 9: ...uding IP route and DNS configuration and IP and DSL performance monitoring l Allows multiple users to access the Internet at the same time by providing maximum Internet utilization to multiple users sharing a single public IP Address l Allows users on Ethernet LAN to transfer data to each other l Friendly built in web based graphical user interface for easy configuration and management through com...

Страница 10: ...bsequent chapters for additional configuration instructions When selecting a location for the ADSL router allow ample clearance to access the connections on the rear panel For convenience try to place the ADSL router near your computer so you can monitor the LED indicators Allow some space above the ADSL router for ventilation to avoid problems with overheating The diagram below illustrates the ha...

Страница 11: ...vice via an Ethernet cable 3 Attach the power connector Connect the power adapter to the Power connector on the back of the device and plug the adapter into a wall outlet or power strip DR811 DR814 has no power switch so it is powered on soon after the power cable is connected to the power jacket 4 Configure your Ethernet PCs You must also configure the Internet properties on your Ethernet PCs Ref...

Страница 12: ...use Internet Explorer v6 or Netscape v6 1 1 The default IP settings for the ADSL router are as follows IP address 192 168 1 1 Subnet mask 255 255 255 0 Before performing the above configurations on the ADSL router first have the computer set in the same subnet with the router To do so first install and enable the TCP IP protocol refer to 5 1 Configuring Ethernet PCs and then set an IP address and ...

Страница 13: ...cked box to deselect the option and then click OK 3 From any of the LAN computers open the web browser type http 192 168 1 1 in the web address or location box and press Enter A login screen is displayed Figure 3 1 Login screen 4 Enter your user name and password The first time you log into the program use the default user ID and password admin and admin Note You can change the password at any tim...

Страница 14: ...g in to the web pages Note If you receive an error message or the Welcome page is not displayed refer to 8 1 Troubleshooting Suggestions 3 2 Web Page Layout The web pages provide information that allows you to configure your device Links to configuration pages are listed in the Main Menu on the left hand side of the screen Click on an individual menu entry to display a page in the Main Frame which...

Страница 15: ... the changes you have made This button appears on configuration pages Click on this button to restore the original settings This button appears on some pop up configuration pages Click on this button to cancel the configurations you have made close the page and return to the Main Frame Radio buttons which appear on many configuration pages Sometimes it may be necessary to select one radio button f...

Страница 16: ... Solid green to indicate that the power has been switched on If this light is not on check the power cable attachment Link Flashing on off while the ADSL line of the device is being activated After about 20 30 seconds solid green to indicate that the device is now communicating normally with the central office Act Flashing on off while data is being transmitted Going off indicates that no data tra...

Страница 17: ...he temporary public IP address of the WAN port on the device It is an unnumbered interface that is replaced as soon as your ISP assigns a real IP address Refer to 7 Service Configuration LAN Port IP Address Assigned static IP address 192 168 1 1 Subnet mask 255 255 255 0 This is the IP address of the LAN port on the device The LAN port connects the device to your Ethernet network Typically you wil...

Страница 18: ...onfiguration procedures 4 1 Quick Setup Click Quick setup in the Main menu to open the Quick Start page This page allows you to l Choose the login type l Set up authentication login details which may be required by your ISP To configure DHCP Login Options click the radio button labeled the following page is displayed Figure 4 1 Quick setup page no login Enter VCI and VPI values as specified by you...

Страница 19: ... Quick setup page PPPoE Enter VCI and VPI values as specified by your ISP the PPPoE login authentication info and configuration and then click the button Note Avoid using the same pair of VPI and VCI values for configuring DHCP and PPPoE login options 4 2 WAN Setting Click WAN Setup in the Main menu and choose the WAN tab in the Main Frame to open the WAN Connection Configuration page ...

Страница 20: ...ce present in the WAN service list l Delete a WAN service present in the WAN service list l Add a new WAN service to the WAN service list l Edit a route To edit a present WAN service click the corresponding label to see the edit page as the following one If needed change the values of the service options then click the button Figure 4 4 Edit WAN settings ...

Страница 21: ... the web page WAN Connection create service To add a new service refer to 7 Service Configuration To configure the routes click the label to open the route configuration page To edit routes refer to 4 6 Route 4 3 DNS Relay A DNS relay server forwards the requests received from the PCs on the LAN to the actual DNS servers When the unit is configured as a DNS relay server users will not need to chan...

Страница 22: ... a present DNS server check the corresponding check box and click the button To add a new DNS server enter the server s IP address and then click the button For more details about IP address refer to 6 1 IP Addresses Note In DNS Server list the first address should correspond to the Primary DNS server the second address should correspond to the Secondary DNS server and so on You cannot have more t...

Страница 23: ...Create a virtual interface l Edit the current virtual interface l Delete the current virtual interface To modify the LAN IP address and subnet mask enter the IP address and or subnet mask and then click the button For more details about IP address refer to 6 1 IP Addresses To configure the advanced attributes about LAN settings click the label to open the web page Edit iplan If needed change the v...

Страница 24: ...resses for more information about IP address The virtual interface created here can be used for DMZ configuration Refer to 4 8 DMZ Configuration for more information To edit the current virtual interface click Edit Then in the new page change the settings if necessary and press change to confirm your changes To delete the current virtual interface click Delete Then in the new page click Delete thi...

Страница 25: ...clients You may check the Use the default range box to assign a suitable default IP address pool on this subnet recommended If needed you can change the DHCP address pool manually but you must uncheck the Use the default range box in the meantime To change the DHCP address pool manually enter the start IP address and or end IP address and then click the button For more details about IP address ref...

Страница 26: ... click the label to open the route configuration page Figure 4 10 Routes configuration This page allows you to l View the information about existing routes l Edit a route present in the route list l Add a new route to the DNS relay s list l Delete a present route This page lists the following information about existing routes l Whether the route is valid or invalid l Destination IP address l Gatew...

Страница 27: ...tions and then click the button To delete an existing route item check the corresponding check box and click the button To add a new route item click the label to open the web page IP V4Route Enter the values of route options and then click the button Click the button to abort this action and return to the route configuration page Figure 4 12 Create routes ...

Страница 28: ...the Main menu and select the Interface tab in the Main Frame to open the Security Interface Configuration page Figure 4 13 Security interface This page allows you to l Enable disable the security l Enable disable the firewall l Enable disable the intrusion detection l Assign the security level l Add delete a security interface l Enable disable NAT to internal interfaces l NAT configuration To enab...

Страница 29: ...rnet users are not allowed to access the intranet High level indicates that Internet users have part of the intranet services access authority medium level indicates even higher authority and Low level indicates the highest authority To set the proper security level position the cursor over the entry and left click to select it and then click the button Note Firewall must be enabled before securit...

Страница 30: ...ity page is displayed The Security Interfaces table displays information about each existing security interface including the interface that you have just configured To delete a present security interface click the corresponding label to open the web page Delete Interface and click the button Figure 4 15 Security delete interface If the NAT is currently disabled you may click the button to enable ...

Страница 31: ...internal interfaces is enabled l Security must be enabled to configure NAT 4 8 DMZ Configuration The DMZ feature that DR series routers provide allows hosts in a DMZ zone to perform unlimited bi directional communication with other Internet users or servers This not only provides a security shelter for internal hosts to normally access the Internet but also satisfies the needs to install servers i...

Страница 32: ...rs in the corresponding items and click the Apply button Figure 4 18 Create a virtual interface The result will appear in a web page showing that a virtual interface with the name of item0 has been added into the list l Add a security interface as instructed in 4 7 Security Interface make settings according to the following figure and then click the Apply button Figure 4 19 Add a security interfac...

Страница 33: ...figure the IP address as 172 16 1 100 the mask as 255 255 0 0 enable the corresponding Internet service and then connect the host to the LAN port of the router and configure the corresponding virtual server As such DMZ is completely and securely configured 4 9 Security Policy A policy is the collective term for the rules that apply to incoming and outgoing traffic between two interface types Firew...

Страница 34: ... from a WAN interface to a LAN interface or from a LAN interface to a WAN interface Note Security policies take effect only after the firewall starts 4 10 Trigger Security triggers are used to deal with application protocols that create separate sessions Some application protocols such as Netmeeting open secondary connections during normal operations Triggers tell the security mechanism to expect ...

Страница 35: ...nu and choose the Trigger tab in the Main Frame to open the Security Trigger Configuration page Figure 4 23 Security trigger This page allows you to l View security triggers present in the current security trigger list l Create a new trigger and add it to the current security trigger list l Delete an existing security trigger To create a new security trigger click the label to open the web page Ad...

Страница 36: ...t l Max Activity Interval type the maximum interval time in milliseconds between the use of secondary port sessions l Enable Session Chaining select Allow or Block depending on whether you want to allow multi level TCP session chaining l Enable UDP Session Chaining select Allow or Block depending on whether you want to allow multi level UDP and TCP session chaining Enable Session Chaining must be ...

Страница 37: ...ect your network from the following kinds of attacks l DOS Denial of Service l Port Scanning l Web Spoofing IDS also implements blacklisting This stops external hosts that try to attack the network from accessing your device for a specific time limit Click Security in the Main menu and choose the IDS tab in the Main Frame to open the Firewall Configure Intrusion Detection page ...

Страница 38: ...DS options and then click the button To clear the blacklist click the button Note By default the Security module is enabled 4 12 SNTP Configuring your device as an SNTP client allows you to obtain accurate time date information from an associated SNTP server If you are not attached to an SNTP server you can set the time date on your own device instead Click Service in the Main menu and choose the ...

Страница 39: ... SNTP Server Configuration Parameters section of the page and click on the button To delete an existing NTP Server click the corresponding button To set the timezone position the cursor over the relevant entry from the timezone drop down list and left click to select it and then click the button 4 13 ZIPB ZIPB stands for Zero Installation PPP Bridge It is a way to ensure that a home user can be as...

Страница 40: ...ct a LAN computer and then click the button To perform advanced ZIPB configurations proceed according to the following steps l Select the LAN interface that ZIPB will run on click on the LAN interface drop down list and select an interface l Select the WAN interface that ZIPB will run on click on the WAN interface drop down list and select an interface Once you have configured ZIPB click the butto...

Страница 41: ...uthorized users may try to guess your username and password They will find it easier to guess the default username and password than to guess your own unique username and password We recommend that you change the default password to your own unique setting Click Device in the Main menu and choose the Password tab in the Main Frame to open the password configuration page Figure 4 29 Modify password...

Страница 42: ...n click the button Figure 4 30 Remote access If the remote administration is currently enabled the following page is displayed Whenever the remote administration is enabled the system starts for timing as soon the timer reaches the set timeout time the remote connection is taken down To disable the remote access click the button Figure 4 31 Disable remote access 4 16 Restart Router Click Device in...

Страница 43: ...ton to restart the ADSL router Note After clicking the restart button wait for several seconds to let the system restart 4 17 Configuration Backup Restore Click Device in the Main menu and choose the Backup tab in the Main Frame to open the configuration management page Figure 4 33 Backup restore configuration This page allows you to l Backup the current configuration to a file on your computer l ...

Страница 44: ...onfiguration file Click the button to pop up the following window Figure 4 35 Save configuration file Enter a proper filename and then click the button to backup the current configuration to the file To restore configuration from a previously saved file click the button to pop up the Choose file window ...

Страница 45: ...e Click the button to open the selected configuration file the following page is displayed Click the button to restore configuration from the selected file Figure 4 37 Restore configuration 4 18 Upgrade Click Device in the Main menu and choose the Upgrade tab in the Main Frame to open the firmware upgrade page ...

Страница 46: ...en the selected firmware image file Click the button to update the system software on the ADSL router with the selected image file Note The upgrade process takes about 2 minutes to complete and the ADSL router will reboot After the router reboots restore the configuration to the factory settings at first to make sure that the current configuration file matches Click the Huawei hyperlink to visit t...

Страница 47: ... information about the setup of the ADSL router including l Details of the ADSL router s Internet access settings l Some important system information hardware information version information l Routing table l Current DSL state and Ethernet connection information l WAN Status l LAN Status l All interfaces status This page allows you to ...

Страница 48: ...displays basic attribute information about the DSL port configuration To configure the basic attributes of DSL port enter the proper values of attributes then click the button To configure the Ethernet port and USB port follow the same step above 4 20 Log Click Status in the Main menu and choose the Log tab in the Main Frame to open the Event log page This page allows you to l Clear the event entr...

Страница 49: ...es defined as below To select the proper event type position the cursor over the entry and left click to select it and then click the button Click the button to clear the selected event entries 4 21 PVC Scan Click Status in the Main menu and choose the Search Service tab in the Main Frame to open the PVC scan page Figure 4 42 Search service ...

Страница 50: ...A service it is also necessary for the users to edit the automatically added services and to enter the username and password The search takes over 5 minutes 4 22 Save Configure Click Save Configure in the Main menu to open the Save configuration page Figure 4 43 Save configuration Click the button to write the current configuration to the flash memory Note You must save your new settings for them ...

Страница 51: ...ther than allow the ADSL router to do so Refer to 5 1 7 Assigning Static Internet Information to Your PCs for instructions l If you have connected your LAN PCs via Ethernet to the ADSL router follow the instructions for the operating system installed on your PC l Windows XP PCs l Windows 2000 PCs l Windows Me PCs l Windows 95 98 PCs l Windows NT 4 0 workstations l If you have connected a PC via th...

Страница 52: ...lled network components If the list includes Internet Protocol TCP IP then the protocol has already been enabled Skip to step 10 4 If Internet Protocol TCP IP is not displayed as an installed component click Install 5 In the Select Network Component Type dialog box select Protocol and then click Add 6 Select Internet Protocol TCP IP in the Network Protocols list and then click OK You may be prompt...

Страница 53: ...o restart your computer with the new settings Next configure the PCs to accept IP information assigned by the ADSL router 9 In the Control Panel double click the Network and Dial up Connections icon 10 In Network and Dial up Connections window right click the Network icon and then select Properties 11 In the Network Properties dialog box select TCP IP and then click Properties 12 In the TCP IP Set...

Страница 54: ...Workstations First check for the IP protocol and if necessary install it 1 In the Windows NT task bar click the Start button point to Settings and then click Control Panel 2 In the Control Panel window double click the Network icon 3 In the Network dialog box click the Protocols tab The Protocols tab is displayed with a list of currently installed network protocols If the list includes TCP IP then...

Страница 55: ...to which you are assigning static IP information l The IP address of the default gateway for your LAN In most cases this is the address assigned to the LAN port on the ADSL router By default the LAN port is assigned this IP address 192 168 1 1 You can change this address or acquire another address from your ISP Refer to 6 IP Addresses Network Masks and Subnets for more information l The IP address...

Страница 56: ...owing installation instruction is based on Windows XP you may refer to it when operating on other operating systems 1 Insert the driver CD to your CDROM The CD shipped with the ADSL router contains the USB drivers Insert it into your PC s CDROM 2 Plug the USB cable from the device into the USB port of the PC The USB cable provided has a flat connector on one end called Type A and a square connecto...

Страница 57: ...rdware 3 Click on Next The PC will search the disc for the driver configuration file When this file is found the PC will begin installing the drivers for the device Figure 5 3 Install software The following window is displayed warning that the device is not compatible with Windows XP Figure 5 4 Driver warning ...

Страница 58: ... completed 5 Click on Finish The toolbar will display the following message confirming that the device has been installed correctly New hardware installed and ready to use In the Windows XP Network Connections dialog box the device is shown as a new LAN device called Aolynk USB Remote NDIS Network Device For example Figure 5 6 Windows XP device properties for the installed device You have now fini...

Страница 59: ...ting system installed on your PC l If you want to assign a static IP address to the PC follow the instructions described in 5 1 7 Assigning Static Internet Information to Your PCs and use the following information In the Network Connections window be sure to select the icon that corresponds to your new USB connection not the one that corresponds to your Ethernet NIC When you display properties for...

Страница 60: ...cimal numbers separated by dots is called dotted decimal notation The IP address 20 56 0 211 is read twenty dot fifty six dot zero dot two eleven 6 1 1 Structure of an IP Address IP addresses have a hierarchical design similar to that of telephone numbers For example a 7 digit telephone number starts with a 3 digit prefix that identifies a group of thousands of telephone lines and ends with four d...

Страница 61: ...over 2 billion hosts Because of their huge size these networks are used for WANs and by organizations at the infrastructure level of the Internet such as your ISP Class B networks are smaller but still quite large each able to hold over 65 000 hosts There can be up to 16 384 class B networks in existence A class B network might be appropriate for a large organization such as a business or governme...

Страница 62: ...As with any class C address all of the bits in field1 through field 3 are part of the network ID but note how the mask specifies that the first bit in field 4 is also included Since this extra bit has only two values 0 and 1 this means there are two subnets Each subnet uses the remaining 7 bits in field4 for its host IDs which range from 1 to 126 hosts instead of the usual 0 to 255 for a class C a...

Страница 63: ...connecting individual ATM segments in ATM switches Each ATM cell carries two labels called Virtual Path Identifier VPI and Virtual Channel Identifier VCI as part of its header An ATM channel commonly referred to as virtual channel is fully identified by these two labels Therefore multiple ATM channels can reside on your DSL line All ATM connections are static i e of type permanent virtual channel ...

Страница 64: ...lick the label to open the web page WAN Connection create service Figure 7 2 Create a new connection 7 2 PureBridge To create a PureBridge WAN connection click the radio button labeled PureBridge then click the button to open the web page WAN Connection PureBridge Enter the proper values of connection options and then click the button ...

Страница 65: ...tion click the radio button labeled DHCP StaticIP then click the button to open the web page WAN Connection DHCP StaticIP Figure 7 4 DHCP StaticIP Enter the proper values of connection options and then click the button 7 4 IPoA To create an IPoA WAN connection click the radio button labeled IPoA then click the button to open the web page WAN Connection IPoA ...

Страница 66: ... PPPoA To create a PPPoA WAN connection click the radio button labeled PPPoA then click the button to open the web page WAN Connection PPPoA Figure 7 6 PPPoA Enter the proper values of connection options and then click the button 7 6 PPPoE To create a PPPoE WAN connection click the radio button labeled PPPoE then click the button to open the web page WAN Connection PPPoE ...

Страница 67: ...ame parameter for a PPPoE interface when it is required by the ISP The ISP uses this to identify the type of connection to use for the interface l Each PPPoE interface is IP enabled i e it has an associated IP address You may specify this IP address in the WAN IP address if the address is allocated statically by the ISP If the IP address is obtained dynamically specify this IP address as 0 0 0 0 ...

Страница 68: ...ne port LINK LAN LED does not illuminate after Ethernet cable is attached Verify that the Ethernet cable is securely connected to your LAN hub or PC and to the ADSL router Make sure the PC and or hub is turned on Verify that you are using a straight through Ethernet cable to the uplink port on a hub or a cross over cable to a stand alone PC If you connect the device to an ordinary hub port not upl...

Страница 69: ...ed in the above item If you specify that the DNS server be assigned dynamically from a server then verify with your ISP that the address configured on the ADSL router is correct and then you can use the ping utility to test connectivity with your ISP s DNS server Generally if a host can ping the Internet IP address but cannot open the web pages the DNS server of the ISP may be experiencing a failu...

Страница 70: ...ss of the computer with which you are trying to communicate On Windows based computers you can execute a ping command from the Start menu Click the Start button and then click Run In the Open text box type a statement such as the following ping 192 168 1 1 Click OK You can substitute any private IP address on your LAN or a public IP address for an Internet site if known If the target computer rece...

Страница 71: ...d to another higher level server and so on until the entry is found The server then returns the associated IP address On Windows based computers you can execute the nslookup command from the Start menu Click the Start button and then click Run In the Open text box type the following Nslookup Click OK A Command Prompt window is displayed with a bracket prompt At the prompt type the name of the Inte...

Страница 72: ...so data rate authenticate To verify a user s identity such as by prompting for a password binary The base two system of numbers which uses only two digits 0 and 1 to represent all numbers In binary the number 1 is written as 1 2 as 10 3 as 11 4 as 100 etc Although expressed as decimal numbers for convenience IP addresses in actual use are binary numbers e g the IP address 209 191 4 240 is 11010001...

Страница 73: ...of a URL which identifies a specific file at a web site See also DNS download To transfer data in the downstream direction i e from the Internet to the user DSL Digital Subscriber Line A technology that allows both digital data and analog voice signals to travel over existing copper telephone lines Ethernet The most commonly installed computer network technology usually using twisted pair wiring E...

Страница 74: ...ss information using web browsers but is accessible only by employees IP See TCP IP IP address Internet Protocol address The address of a host computer on the Internet consisting of four numbers each from 0 to 255 separated by periods e g 209 191 4 240 An IP address consists of a network ID that identifies the particular network the host belongs to and a host ID uniquely identifying the host itsel...

Страница 75: ...erhead information such as where it comes from source address and where it should go destination address ping Packet Internet or Inter Networ k Groper A program used to verify whether the host associated with an IP address is online It can also be used to reveal the IP address for a given domain name port A physical access point to a device such as a computer or router through which data flows int...

Страница 76: ...CP IP refers to this whole suite of protocols Telnet An interactive character based program used to access a remote computer While HTTP the web protocol and FTP only allow you to download files from a remote computer Telnet allows you to log into and use a computer from a remote location TFTP Trivial File Transfer Protocol A protocol for file transfers TFTP is easier to use than File Transfer Prot...

Страница 77: ...ontaining text graphics and hyperlinks cross references to the other pages on that web site as well as to pages on other web sites When a user accesses a web site the first page that is displayed is called the home page See also hyperlink web site Web site A computer on the Internet that distributes information to and gets information from remote users through web browsers A web site typically con...

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