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Digisol DG-BR4400AC, User Manual

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Digisol DG-BR4400AC User Manual Download Page 13

DG-BR4400AC User Manual

13

1-5

Get Familiar with your new wireless broadband router

Front Panel

LED Name Light

Status

Description

PWR

On

Router is switched on and correctly powered.

5G

On

5GHz Wireless WPS function is enabled.

Off

5GHz Wireless network is switched off.

Flashing

5GHz Wireless LAN activity (transferring or
receiving data).

2.4G

On

2.4GHz Wireless WPS function is enabled.

Off

2.4GHz Wireless network is switched off.

Flashing

2.4GHz Wireless LAN activity (transferring or
receiving data).

WAN
LNK/ACT

On

WAN port is connected.

Off

WAN port is not connected.

Flashing

WAN activity (transferring or receiving data).

LAN 1-4
LNK/ACT

On

LAN port is connected.

Off

LAN port is not connected.

Flashing

LAN activity (transferring or receiving data).

Summary of Contents for DG-BR4400AC

Page 1: ...0AC User Manual DG BR4400AC 802 11AC 433MBPS WIRELESS BROADBAND ROUTER User Manual V1 0 2014 04 16 As our products undergo continuous development the specifications are subject to change without prior...

Page 2: ...their purchase the buyer and not this company its distributor or its dealer assumes the entire cost of all necessary servicing repair and any incidental or consequential damages resulting from any de...

Page 3: ...rdance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does c...

Page 4: ...ges or modifications not expressly approved by the party responsible for compliance could void the authority to operate equipment This device is restricted to indoor use when operated in the 5 15 to 5...

Page 5: ...r the safety of those who install and use it However special attention must be paid to the dangers of electric shock and static electricity when working with electrical equipment All guidelines of thi...

Page 6: ...ws Vista Windows 7 IP address setup 25 2 2 5 Windows 8 IP address setup 27 2 2 6 Router IP address lookup 29 2 3 Using Quick Setup 33 2 3 1 Setup procedure for Cable Modem 36 2 3 2 Setup procedure for...

Page 7: ...2 7 3 1 Disable wireless security 84 2 7 3 2 WEP Wired Equivalent Privacy 85 2 7 3 3 Wi Fi Protected Access WPA 88 2 7 3 4 WPA RADIUS 90 2 7 4 Wireless Access Control 91 2 7 5 Wi Fi Protected Setup W...

Page 8: ...9 3 4 2 Internet Connection Status 130 3 4 3 Device Status 131 3 4 4 System Log 132 3 4 5 Security Log 133 3 4 6 Active DHCP client list 134 3 4 7 Statistics 135 3 5 System Tools 136 3 5 1 Configurati...

Page 9: ...network capabilities simultaneously all computers and wireless enabled network devices including PDA Smart phone Game console Tablet and more can connect to this wireless router without additional cab...

Page 10: ...QoS DMZ Virtual Servers Access Control Firewall Allows you to monitor the router s status like DHCP Client Log System Log Security Log and Device Connection Status Easy to use Web based GUI for networ...

Page 11: ...rranty will be void 5 Accessories of this router like antenna and power supply are dangerous to small children under 3 years old They may put the small parts in their nose or mouth and it could cause...

Page 12: ...45 Ethernet port Computer or network devices with wired or wireless network interface card Web browser Microsoft Internet Explorer Google Chrome or Safari web browser An available AC power outlet 100...

Page 13: ...ashing 5GHz Wireless LAN activity transferring or receiving data 2 4G On 2 4GHz Wireless WPS function is enabled Off 2 4GHz Wireless network is switched off Flashing 2 4GHz Wireless LAN activity trans...

Page 14: ...de Area Network WAN Internet port Power Power connector connects to A C power adapter Reset WPS Resets the router to factory default settings clear all settings or start WPS function Press this button...

Page 15: ...1 Build network connection Please follow the below mentioned instructions to build the network connection between your new WIRELESS router and your computers network devices 1 Connect your xDSL Cable...

Page 16: ...DG BR4400AC User Manual 16 2 Connect all your computers network devices network enabled consumer devices other than computers like Game console or Switch Hub to the LAN port of the router...

Page 17: ...Ds on the front panel PWR LED should be steadily on WAN and LAN LEDs should be on if the computer network device connected to the respective port of the router is powered on and correctly connected If...

Page 18: ...procedures your computer must be able to get an IP address automatically use dynamic IP address If it s set to use static IP address or you are unsure please follow the below mentioned instructions to...

Page 19: ...Windows 95 98 Me IP address setup 1 Click Start button it should be located at lower left corner of your computer then click control panel Double click Network icon and Network window will appear Sel...

Page 20: ...DG BR4400AC User Manual 20 2 Select Obtain an IP address from a DHCP server and then click OK...

Page 21: ...ton it should be located at lower left corner of your computer then click control panel Double click Network and Dial up Connections icon click Local Area Connection and Local Area Connection Properti...

Page 22: ...DG BR4400AC User Manual 22 2 Select Obtain an IP address automatically and Obtain DNS server address automatically then click OK...

Page 23: ...ated at lower left corner of your computer then click control panel Double click Network and Internet Connections icon click Network Connections and then double click Local Area Connection Local Area...

Page 24: ...DG BR4400AC User Manual 24 2 Select Obtain an IP address automatically and Obtain DNS server address automatically then click OK...

Page 25: ...at lower left corner of your computer then click control panel Click Network and Sharing Center and then click Change adapter settings Right click Local Area Connection then select Properties Local A...

Page 26: ...DG BR4400AC User Manual 26 2 Select Obtain an IP address automatically and Obtain DNS server address automatically then click OK...

Page 27: ...e located at lower left corner of your computer then click control panel Click Network and Sharing Center and then click Change adapter settings Right click Ethernet then select Properties Ethernet Pr...

Page 28: ...DG BR4400AC User Manual 28 2 Select Obtain an IP address automatically and Obtain DNS server address automatically then click OK...

Page 29: ...DG BR4400AC User Manual 29 2 2 6 Router IP address lookup After the IP address setup is complete please click start run at the bottom lower corner of your desktop Input cmd then click OK...

Page 30: ...his example the IP address of the router is 192 168 2 1 NOTE If the IP address of the gateway is not displayed or the address followed by IP Address begins with 169 please recheck network connection b...

Page 31: ...rom router please start your web browser and input the IP address of router in address bar The following message should be shown Please input user name and password in the field respectively default u...

Page 32: ...n about the user name and password you typed please go to 4 2 Troubleshooting to perform a factory reset to set the password back to default value TIP This page shows the four major setting categories...

Page 33: ...e which will help you to complete all required settings you need to access the Internet in very short time Please follow the instructions mentioned below to complete the Quick Setup Please go to Quick...

Page 34: ...me server here Daylight Savings If the country you live in uses daylight saving please check Enable box and choose the duration of daylight saving After you finish with all the settings please click N...

Page 35: ...rnet service provider A wrong Internet connection type will cause connection problem and you will not be able to connect to internet If you want to go back to previous step please press Back button on...

Page 36: ...so MAC address Please input MAC address of your computer here if your service provider only permits computer with certain MAC address to access internet If you re using the computer which used to conn...

Page 37: ...der Default Gateway Please input the IP address of default gateway provided by your service provider When you finish with all settings press OK if you want to go back to previous menu click Back NOTE...

Page 38: ...here Service Name Please give a name to this Internet service this is optional MTU Please input the MTU value of your network connection here If you don t know you can use default value Connection Typ...

Page 39: ...ction alive Connect on Demand only connects to Internet when there s a connect attempt and Manual only connects to Internet when Connect button on this page is pressed and disconnects when Disconnect...

Page 40: ...how to change the time zone password and remote management settings Please start your web browser and log onto router web management interface then click General Setup button on the left or click Gen...

Page 41: ...er If you want to enable daylight savings setting please check Enable box and set the duration of daylight setting When you finish click Apply You will see the following message displayed on the web b...

Page 42: ...tions Please click System menu on the left of web management interface then click Password Settings and the following message will be displayed on your web browser Here is the description of every set...

Page 43: ...urrent Password field is wrong please click OK to go back to previous menu and try to input current password again If the current and new passwords are correctly entered after you click Apply you will...

Page 44: ...ft of web management interface then click Remote Management and the following message will be displayed on your web browser Here is the description of every setup item Item Description Host Address In...

Page 45: ...c IP address it will not be a problem but if the IP address your service provider assigns to you will vary every time you establish an internet connection this will be a problem Please either ask your...

Page 46: ...the left of web management interface and the following message will be displayed on your web browser Please select an Internet connection method depending on the type of connection you are using You c...

Page 47: ...C Address Please input MAC address of your computer if your service provider only permits computer with certain MAC address to access internet If you re using the computer which used to connect to Int...

Page 48: ...the settings will take effect Please wait for about 40 seconds while the router is rebooting 2 5 2 Setup procedure for Static IP Here is the description of every setup item Item Description IP Addres...

Page 49: ...web browser Please click Continue to go back to previous setup menu to continue on other setup procedures or click Apply to reboot the router so the settings will take effect Please wait for about 40...

Page 50: ...ice Name Please give a name to this Internet service this is optional MTU Please input the MTU value of your network connection here If you don t know you can use default value Connection Type Please...

Page 51: ...you have selected the connection type to Connect On Demand please input the idle time out After you finish with all settings please click Apply button and the following message will be displayed on y...

Page 52: ...eason you can input the IP address of DNS server here Here is the description of every setup item Item Description Primary DNS Address Please input the IP address of DNS server provided by your servic...

Page 53: ...button 2 5 5 Setup procedure for DDNS DDNS Dynamic DNS is an IP to Hostname mapping service for those Internet users who don t have a static fixed IP address It will be a problem when such user wants...

Page 54: ...ings will take effect Please wait for about 40 seconds while router is rebooting If you want to reset all settings in this page back to previously saved value please click Cancel button Item Descripti...

Page 55: ...DG BR4400AC User Manual 55 2 5 6 WAN Speed It is used for setting up the WAN port speed...

Page 56: ...static IP address set the IP address for every computer manually and dynamic IP address IP address of computers will be assigned by router automatically It s recommended for most of computers to use d...

Page 57: ...work with up to 253 clients so you can set d field of IP address of router as 1 or 254 or any number between 1 and 254 and pick a number between 0 and 254 for field c 2 In most cases you should use 25...

Page 58: ...network 802 1d Spanning Tree If you wish to activate 802 1d spanning tree function select Enable for setup item 802 1d Spanning Tree or set it to Disable DHCP Server If you want to activate DHCP serv...

Page 59: ...of every IP address assigned by this router from drop down menu DHCP client Start IP Please input the start IP address of the IP range DHCP client End IP Please input the end IP address of the IP rang...

Page 60: ...tem Item Description Enable Static DHCP Leases Check this box to enable this function otherwise uncheck it to disable this function MAC Address Input the MAC address of the computer or network device...

Page 61: ...C address and IP address mapping then click Delete button if you want to delete all mappings click Delete All After you finish all LAN settings please click Apply button on this page After you click A...

Page 62: ...cious intruders This router supports both 2 4GHz and 5GHz wireless bands simultaneously the wireless settings for both wireless bands are almost the same The following sections will only highlight the...

Page 63: ...ase select Enable then click Apply button After you click Apply the following message will be displayed on your web browser Please click Continue to go back to previous setup menu to continue on other...

Page 64: ...then click Basic Settings and the following message will be displayed on your web browser 2 4GHz Wireless 5GHz Wireless This wireless router can work in 6 modes a Access Point Standard wireless AP b...

Page 65: ...ion mode you want to use from Mode dropdown menu and continue on other operation mode specific settings Access Point Please go to section 2 7 1 1 Station Infrastructure Please go to section 2 7 1 2 AP...

Page 66: ...Settings 5GHz Access Point Settings Here is the description of every setup item Item Description Band Please select the radio band from one of following options 2 4GHz Band 2 4 GHz B this mode only a...

Page 67: ...802 11n clients 5GHz Band 5GHz A this mode allows 802 11a wireless network client to connect to this router maximum transfer rate 54Mbps for 802 11a clients 5GHz N this mode allows 802 11n wireless ne...

Page 68: ...o you like myhome office_room1 etc Channel Number Please select a channel from the dropdown list of Channel Number You can choose any channel number you want to use and almost all wireless clients can...

Page 69: ...e same channel which will disturb the radio communication between wireless client and the wireless router NOTE For 802 11n mode The router is operating in a 2T2R Spatial Multiplexing MIMO configuratio...

Page 70: ...ture Settings 5GHz Station Infrastructure Settings Here is the description of every setup item Item Description Band Select the band you want to use SSID This is the name of the wireless network You c...

Page 71: ...ey re on the same physical network This function is very convenient when you need to connect two networks between two buildings Here are the instructions about how to connect two wireless routers toge...

Page 72: ...is mode of the wireless routers will think they re on the same physical network 2 4GHz AP Bridge Point to Multi Point Settings Item Description Band Select the band you want to use Two wireless router...

Page 73: ...want to use two wireless routers must use the same setting Channel Number Select the channel you want to use two wireless routers must use the same setting MAC address 1 to 4 Input the MAC address of...

Page 74: ...In this mode you can expand the scope of network by combining up to four other access points together and every access point can still accept wireless clients 2 4GHz AP Bridge WDS Settings NOTE For WD...

Page 75: ...ience of roaming Channel Number Select the channel you want to use all the wireless routers must use the same setting Associated Clients Click Show Active Clients button then an Active Wireless Client...

Page 76: ...to a Root AP and use AP function to service all wireless stations within its coverage 2 4GHz Universal Repeater Settings 5GHz Universal Repeater Settings NOTE For Repeater Mode this router will demodu...

Page 77: ...yhome office_room1 etc Channel Number Select the channel you want to use all the wireless clients must use the same setting Associated Clients Click Show Active Clients button then an Active Wireless...

Page 78: ...fter you click Apply the following message will be displayed on your web browser Please click Continue to go back to previous setup menu to continue on router setup or click Apply to reboot the router...

Page 79: ...dvanced control of wireless parameters if you want to configure these settings please click 2 4GHz Wireless or 5GHz Wireless menu on the left of web management interface then click Advanced Settings a...

Page 80: ...t it is default value is 2346 RTS Threshold Set the RTS threshold of wireless radio Do not modify default value if you don t know what it is default value is 2347 Beacon Interval Set the beacon interv...

Page 81: ...e the ESSID of your wireless router set the option to Disable so only people those who know the ESSID of your wireless router can get connected CTS Protect Enabling this setting will reduce the chance...

Page 82: ...rebooting 2 7 3 Wireless Security It s very important to set wireless security settings properly If you don t hackers and malicious users can reach your network and valuable data without your consent...

Page 83: ...data you transfer over network without your consent 2 7 3 2 WEP Wired Equivalent Privacy When you select this mode the wireless router will use WEP encryption and the following setup menu will be show...

Page 84: ...d A Z if you select ASCII key format and if you select Hex as key format you can use characters 0 9 a f and A F Enable 802 1x Authentication IEEE 802 1x is an authentication protocol Every user must u...

Page 85: ...haracters pilot phone 23561 2Hyux xmL ASCII 13 characters digitalFAMILY 82Jh26xHy3m n Hex 10 characters 287d2aa732 1152dabc85 Hex 26 characters 9284bcda8427c9e036f7abcd84 To improve security level do...

Page 86: ...i Protected Access WPA When you select this mode the wireless router will use WPA encryption and the following setup menu will be shown on your web browser Here is the description of every setup item...

Page 87: ...reboot the router so the settings will take effect Please wait for about 40 seconds while router is rebooting characters of 0 9 and a f Pre shared Key Please input the WPA passphrase here It is not re...

Page 88: ...uite Available options are WPA TKIP WPA2 AES and WPA2 Mixed You can select one of them but you have to make sure your wireless client supports the cipher you selected RADIUS Server IP address Please i...

Page 89: ...ccess Control This function will help you to prevent unauthorized users from connecting to your wireless router only those wireless devices who have the MAC address you assigned here can gain access t...

Page 90: ...MAC addresses listed here please click Delete All button Enable Access Control To enforce MAC address filtering you have to check Enable Access Control When this item is unchecked wireless router wil...

Page 91: ...e wait for about 40 seconds while router is rebooting If you want to reset all settings in this page back to previously saved value please click Cancel button alphanumerical characters here This is op...

Page 92: ...PBC and PIN code If you want to use PBC you have to push a specific button on the wireless client to start WPS mode and switch this wireless router to WPS mode too You can push Reset WPS button of th...

Page 93: ...h other WPS enabled wireless devices SSID The SSID of this wireless router will be displayed here Authentication Mode The wireless security authentication mode of this wireless router will be displaye...

Page 94: ...for 2 minutes The WLAN LED on the wireless router will be steady on for 2 minutes when this wireless router is waiting for incoming WPS request Configure by client PinCode Please input the PIN code o...

Page 95: ...member that the wireless client is capable to keep the key or passphrase for you so you only have to input the complicated key or passphrase once This will greatly improve security level 3 You can hid...

Page 96: ...ich require guaranteed bandwidth like video streaming and network telephone will be affected therefore an unpleasing result will occur like the interruption of video audio transfer With this function...

Page 97: ...ton to add a new QoS rule see section 3 1 2 Add a new QoS rule below Edit If you want to modify the content of a specific rule please check the select box of the rule you want to edit then click Edit...

Page 98: ...setup procedures or click Apply to reboot the router so the settings will take effect Please wait for about 40 seconds while router is rebooting If you want to reset all settings in this page back to...

Page 99: ...ct the type of QoS guarantee guaranteed usable bandwidth for this rule or max set the maximum bandwidth for the application allowed by this rule Local IP Address Specify the local source IP address th...

Page 100: ...he left field to define a single IP address Remote Port Range Please input the range of remote destination port number that will be affected by this rule If you want to apply this rule on port 80 to 9...

Page 101: ...s to every user Therefore it s necessary to use NAT technology to share a single Internet IP address to multiple computers on local network so everyone can get connected to Internet Please follow the...

Page 102: ...2 2 Port Forwarding This function allows you to redirect a single port or consecutive ports of Internet IP address to the same port of the IP address on local network The port number s of Internet IP...

Page 103: ...ecking the IP address of the computer Type Select the type of connection TCP or UDP If you re not sure please select Both Port Range Input the starting port number in the left field and input the endi...

Page 104: ...ck Apply to reboot the router so the settings will take effect Please wait for about 40 seconds while router is rebooting If you want to reset all settings in this page back to previously saved value...

Page 105: ...NAT menu on the left of web management interface then click Virtual Server and the following message will be displayed on your web browser Here is the description of every setup item Item Description...

Page 106: ...P If you re not sure please select Both Public Port Please select the port number of Internet IP address which will be redirected to the port number of local IP address defined above Comment Please in...

Page 107: ...ess Input the IP address of the computer which you want to open the ports Computer Name Pull down the menu and all the computers connected to the router will be listed here You can easily select the c...

Page 108: ...t Table Reset Click Reset will clear all above setting and you can set up again Current Trigger Port All the settings for the special applications will be listed here If you want to remove some Specia...

Page 109: ...k NAT menu on the left of web management interface then click UPnP and the following message will be displayed on your web browser There is only one option in this page please select Enable or Disable...

Page 110: ...plications which required special support will be able to work with NAT architecture Please click NAT menu on the left of web management interface then click ALG Settings and the following message wil...

Page 111: ...firewall function to block malicious intruders from accessing your computers on local network These functions include inbound attack prevention and block outbound traffics like block URLs which have...

Page 112: ...for about 40 seconds while router is rebooting 3 3 1 Access Control This function allows or denies computers with specific MAC address from connecting to the network it can also allow or deny computer...

Page 113: ...and all the computers connected to the router will be listed here You can easily select the computer name without checking the IP address of the computer Comment You can input any text here as the com...

Page 114: ...or of IP filtering table If you select deny all IP addresses listed in filtering table will be denied from connecting to the network if you select allow only IP addresses listed in filtering table wil...

Page 115: ...Manual 115 If you want to reset all settings in this page back to previously saved value please click Cancel button 3 3 1 1 Add PC After button is clicked the following message will be displayed on y...

Page 116: ...define a single IP address Client PC Service Please check all services you want to allow or deny this IP address to use you can check multiple services Protocol If the service you need is not listed a...

Page 117: ...o set URL blocking parameters Please click Firewall menu on the left of web management interface then click URL Blocking and the following message will be displayed on your web browser Here is the des...

Page 118: ...in this page back to previously saved value please click Cancel button Keyword filtering table Reset Click Reset to remove the value you inputted in URL Keyword field Current URL Blocking Table All ex...

Page 119: ...u Please follow the instructions mentioned below to set DoS prevention parameters Please click Firewall menu on the left of web management interface then click DoS and the following message will be di...

Page 120: ...ore all inbound PING request but when you activate this function you will not be able to ping your own router from internet too Port Scan Some malicious intruder will try to use a port scanner to know...

Page 121: ...activated Please check the box of Ping of Death and input the frequency of threshold how many packets per second minute or hour you can also input the Burst value which means when this number of Ping...

Page 122: ...ncel button 3 3 4 Demilitarized Zone DMZ Demilitarized Zone DMZ refers to a special area in your local network This area resides in local network and all computers in this area uses private IP address...

Page 123: ...put the IP address that you want to map to a specific private IP address Client PC IP address Please input the private IP address that the Internet IP address will be mapped to Computer Name Pull down...

Page 124: ...is rebooting If you want to reset all settings in this page back to previously saved value please click Cancel button Current DMZ Table All existing public IP address and private IP address mapping w...

Page 125: ...us The functions described here will provide you the system related information To enter system status menu please either click Status link located at the upper right corner of web management interfac...

Page 126: ...an use this function to know the system information and firmware version of this router Please click Status link located at the upper right corner of web management interface and the following message...

Page 127: ...se this function to know the status of current Internet connection Please click Internet Connection menu on the left of web management interface and the following message will be displayed on your web...

Page 128: ...can use this function to know the status of your router Please click Device Status menu on the left of web management interface and the following message will be displayed on your web browser This in...

Page 129: ...k System Log menu on the left of web management interface and the following message will be displayed on your web browser The system events will be displayed in this page and here are descriptions of...

Page 130: ...router Please click Security Log menu on the left of web management interface and the following message will be displayed on your web browser The system events will be displayed in this page and here...

Page 131: ...to check all active DHCP leases issued by this router Please click Active DHCP client menu on the left of web management interface and the following message will be displayed on your web browser All i...

Page 132: ...on to check the statistics of wireless LAN and WAN interface of this router Please click Statistics menu on the left of web management interface and the following message will be displayed on your web...

Page 133: ...ide you system tools for the all the settings backup restore firmware upgrade and resetting the router to default settings To enter system status menu please either click Tools link located at the upp...

Page 134: ...Here is the description of every setup item Item Description Backup Settings Press Save button and you ll be prompted to download the configuration as a file default filename is config bin you can sav...

Page 135: ...ix the bugs of this router To upgrade firmware please follow the following instructions Please click Tool located at the upper right corner of web management interface then click Firmware Upgrade on t...

Page 136: ...cated at the upper right corner of web management interface then click Reset on the left of web management interface then the following message will be displayed on your web browser Please click Apply...

Page 137: ...WAN Port 10 100M Port x 1 LAN Ports 10 100M Port x 4 Antenna External Dipole Antenna x 2 2 4G x 1 2 4G 5G x 1 Power DC 5V 1 5A Switching Power Adapter Dimension 30 H x 127 W x 105 D mm Weight 175 gms...

Page 138: ...rectly powered c You must use the same IP address section which router uses d Are you using MAC or IP address filter Try to connect the router by another computer and see if it works if not please res...

Page 139: ...hostname please check DNS setting I can t locate my router by my wireless client a Broadcast ESSID set to off b All two antennas are properly secured c Are you too far from your router Try to get clos...

Page 140: ...ly forget the password do a hard reset Router become hot a This is not a malfunction if you can keep your hand on the router s case b If you smell something wrong or see the smoke coming out from rout...

Page 141: ...yping Broadbandrouter com into your Internet browser the user is sent to the proper IP address The DNS server IP address used by the computers on your home network is the location of the DNS server yo...

Page 142: ...ork mask is 11111111 11111111 11110000 00000000 It means the device s network address is 11011001 10110000 10010000 00000000 and its host ID is 00000000 00000000 00000000 00000111 This is a convenient...

Page 143: ...5 POP3 TCP 110 H 323 TCP 1720 SNMP UCP 161 SNMP Trap UDP 162 HTTP TCP 80 PPTP TCP 1723 PC Anywhere TCP 5631 PC Anywhere UDP 5632 PPPoE Point to Point Protocol over Ethernet Point to Point Protocol is...

Page 144: ...nreliable Datagram Protocol UDP TCP IP is the standard protocol for data transmission over the Internet Both TCP and UDP are transport layer protocol TCP performs proper error detection and error reco...

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