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DES-3226L Layer 2

Fast Ethernet Switch User’s Guide

802.1x State

Figure 6-31. 802.1x State window

The following fields can be set:

Parameter

Description

802.1x State

This window allows the user to enable or disable the 802.1x Port-
Based Network Access control server application on the switch.
When the 802.1x function is disabled, authentication packets are
flooded to all ports except the source port.

802.1x Port Settings

Existing 802.1x port settings are displayed and can be configured using the windows below.

Figure 6-32. 802.1x Port Settings window

Содержание DES-3226L

Страница 1: ...D Link DES 3226L Managed 24 port 10 100Mbps and 2GE ports Layer 2 Ethernet Switch Manual...

Страница 2: ...radiate radio frequency energy and if not installed and used in accordance with this manual may cause harmful interference to radio communications Operation of this equipment in a residential area is...

Страница 3: ...LLING THE SWITCH IN A RACK 9 Mounting the Switch in a standard 19 rack 10 POWER ON 10 Power Failure 10 Connecting The Switch 11 SWITCH TO END NODE 11 SWITCH TO HUB OR SWITCH 11 CONNECTING TO NETWORK B...

Страница 4: ...Settings 60 STP Port Settings 62 FORWARDING 64 MAC Forwarding 64 CONFIGURE QOS 65 802 1p User Priority 66 Bandwidth Control Table 67 MIRRORING CONFIGURATIONS 68 VLAN CONFIGURATIONS 69 VLAN Mode Set 7...

Страница 5: ...Cable Lengths 109 Glossary 110...

Страница 6: ...d other aspects about how to manage the Switch Section 5 Basic Switch Configuration A detailed discussion about configuring some of the basic functions of the switch including accessing the Switch inf...

Страница 7: ...ts appearing on your screen For example You have mail Bold font is also used to represent filenames program names and commands For example use the copy command Boldface Typewriter Font Indicates comma...

Страница 8: ...TE indicates important information that helps you make better use of your device NOTICE A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem CA...

Страница 9: ...or plug is damaged An object has fallen into the product The product has been exposed to water The product has been dropped or damaged The product does not operate correctly when you follow the operat...

Страница 10: ...n extension cable use a 3 wire cable with properly grounded plugs Observe extension cable and power strip ratings Make sure that the total ampere rating of all products plugged into the extension cabl...

Страница 11: ...that the stabilizers are secured to the rack extended to the floor and that the full weight of the rack rests on the floor Install front and side stabilizers on a single rack or front stabilizers for...

Страница 12: ...can harm delicate components inside your system To prevent static damage discharge static electricity from your body before you touch any of the electronic components such as the microprocessor You ca...

Страница 13: ...ogy Gigabit Ethernet is an extension of IEEE 802 3 Ethernet utilizing the same packet structure format and support for CSMA CD protocol full duplex flow control and management objects but with a tenfo...

Страница 14: ...ied while still maintaining the same network cabling and adapter cards For Fast Ethernet or Gigabit Ethernet networks a switch is an effective way of eliminating problems of chaining hubs beyond the t...

Страница 15: ...t full wire speed maximum 14 881 packets sec on each 10Mbps Ethernet port and maximum 148 810 packet sec on 100Mbps Fast Ethernet port Full and half duplex for both 10Mbps and 100Mbps connections Full...

Страница 16: ...e flow control Two 1000BASE T Mini GBIC combo ports for connecting to another switch server or network backbone RS 232 DCE Diagnostic port console port for setting up and managing the Switch via a con...

Страница 17: ...t in the back of the Switch using a straight through serial cable Port LEDs One row of LEDs for each port is located above the ports on the front panel The first LED is for the top port and the second...

Страница 18: ...dissipate heat The sides of the system also provide heat vents to serve the same purpose Do not block these openings and leave at least 6 inches of space at the rear and sides of the switch for prope...

Страница 19: ...DES 3226L Layer 2 Fast Ethernet Switch User s Guide Figure 1 5 Mini GBIC modules plug in to the Switch Figure 1 6 Installing the Mini GBIC Module 7...

Страница 20: ...Link Reseller for replacement Before You Connect to the Network The site where you install the Switch may greatly affect its performance Please follow these guidelines for setting up the Switch Instal...

Страница 21: ...a desktop or shelf the rubber feet included with the Switch should first be attached Attach these cushioning feet on the bottom at each corner of the device Allow enough ventilation space between the...

Страница 22: ...r cord into the power connector of the Switch and the other end into the local power source outlet After the Switch is powered on the LED indicators will momentarily blink This blinking of the LED ind...

Страница 23: ...be connected to the Switch via a twisted pair Category 3 4 or 5 UTP STP cable The end node should be connected to any of the ports of the Switch Figure 3 1 Switch connected to an end node The Link Ac...

Страница 24: ...re ideal for uplinking to a network backbone or server The copper ports operate at a speed of 1000 100 or 10Mbps in full or half duplex mode The fiber optic ports can operate at 1000Mbps in full and h...

Страница 25: ...ter you have successfully installed the Switch you can configure the Switch monitor the LED panel and display statistics graphically using a web browser such as Opera Netscape Navigator version 6 2 an...

Страница 26: ...rt 2 3 Set the data rate to 9600 baud 4 Set the data format to 8 data bits 1 stop bit and no parity 5 Set flow control to none 6 Under Properties select VT100 for Emulation mode 7 Select Terminal keys...

Страница 27: ...where you will find the Emulation options If you still don t see anything try rebooting the Switch by disconnecting its power supply Once connected to the console the screen below will appear on your...

Страница 28: ...en first time connecting to the Switch Press Enter in both the Username and Password fields You will be given access to the command prompt DES 3226L shown below There is no initial username or passwor...

Страница 29: ...e Switch do the following 1 At the CLI login prompt enter create account admin followed by the user name and press the Enter key 2 You will be asked to provide a password Type the password used for th...

Страница 30: ...e level of security provided between the management station and the network device In SNMP v 1 and v 2 user authentication is accomplished using community strings which function like passwords The rem...

Страница 31: ...formation Base module Consequently values for MIB objects can be retrieved from any SNMP based network management software In addition to the standard MIB II the Switch also supports its own proprieta...

Страница 32: ...over the console serial port as follows 1 Starting at the command line prompt enter the commands config ipif System ipaddress xxx xxx xxx xxx yyy yyy yyy yyy Where the x s represent the IP address to...

Страница 33: ...via the Web based management Connecting Devices to the Switch After you assign IP addresses to the Switch you can connect devices to the Switch To connect a device to an SFP transceiver port 1 Use yo...

Страница 34: ...embedded web based HTML interface The Switch can be managed from remote stations anywhere on the network through a standard browser such as Opera Netscape Navigator Communicator or Microsoft Internet...

Страница 35: ...device The URL in the address bar should read something like http 123 123 123 123 where the numbers 123 represent the IP address of the Switch NOTE The Factory default IP address for the switch is 10...

Страница 36: ...xplained below Web based User Interface The user interface provides access to various Switch configuration and management screens allows you to view performance statistics and permits you to graphical...

Страница 37: ...ession must be saved in the Save Changes web menu explained below or use the command line interface CLI command save Web Pages When you connect to the management mode of the Switch with a web browser...

Страница 38: ...ick the Switch Information link in the Configuration menu Figure 5 4 Switch Information Basic Settings window The Switch Information window shows the Switch s MAC Address assigned by the factory and u...

Страница 39: ...Open the Management folder and click the Basic Switch Settings menu button The web manager will display the Switch s current IP settings and an IP configuration menu as seen below Figure 5 5 Basic Swi...

Страница 40: ...xx xxx xxx xxx where each xxx is a number represented in decimal form between 0 and 255 This address should be a unique address on the network assigned for use by the network administrator The fields...

Страница 41: ...set using the Command Line Interface CLI over the console serial port as follows Starting at the command line prompt enter the commands config ipif System ipaddress xxx xxx xxx xxx yyy yyy yyy yyy Wh...

Страница 42: ...used to change and view the Console settings for your switch The default Baud Rate for this switch is set at 9600 and may be altered from 119200 38400 to 115200 to perform different functions Data Bi...

Страница 43: ...ibutes and properties for individual physical ports including port speed and flow control Clicking on Port Configurations will open the following window for the user Figure 5 7 Port Configurations win...

Страница 44: ...M Half 10M Full and 10M Half There is no automatic adjustment of port settings with any option other than Auto For the two Mini GBIC Combo ports the user may set the speed to Auto 100M Full 100M Half...

Страница 45: ...tive 3 A listing of all user accounts and access levels is shown in the User Account Management window This list is updated when Apply is executed Click Show All User Account Entries to access this wi...

Страница 46: ...ny changes to its non volatile ram and reboot You can logon again and are now ready to continue configuring the Switch Network Management The DES 3226L allows you to manage the switch via the Network...

Страница 47: ...le Figure 5 12 SNMP View Table To delete an existing SNMP View Table entry click the selection button on the far left that corresponds to the port you want to configure and click the Delete button To...

Страница 48: ...access Select Excluded to exclude this object from the list of objects that an SNMP manager can access SNMP Group Table An SNMP Group created with this table maps SNMP users identified in the SNMP Use...

Страница 49: ...SNMP version 2c will be used The SNMP v2c supports both centralized and distributed network management strategies It includes improvements in the Structure of Management Information SMI and adds some...

Страница 50: ...o use the community string to gain access to the Switch s SNMP agent An MIB view that defines the subset of all MIB objects that will be accessible to the SNMP community Read write or read only level...

Страница 51: ...ty string created with this command can only read the contents of the MIBs on the Switch read_write Specifies that SNMP community members using the community string created with this command can read...

Страница 52: ...he Auth NoPriv security level V3 Auth Priv To specify that the SNMP version 3 will be used with the Auth Priv security level Community String or SNMP V3 User Name Type in the community string or SNMP...

Страница 53: ...twork Management folder Click on SNMPV3 and finally click on the SNMP User Table link This will open the SNMP User Table as shown below Figure 5 21 SNMP User Table window To delete an existing entry c...

Страница 54: ...HMAC SHA authentication protocol will be used Priv Protocol None Indicates that no authorization protocol is in use DES Indicates that DES 56 bit encryption is in use based on the CBC DES DES 56 stan...

Страница 55: ...istory log can be uploaded from the Switch to the TFTP server Download Firmware from TFTP Server To update the Switch s firmware click Basic Setup TFTP Services Download Firmware from TFTP Server Figu...

Страница 56: ...witch parameters explicitly stated in the configuration file All other switch parameters will remain unchanged Click Save Settings to record the IP address of the TFTP server Click Download to initiat...

Страница 57: ...transfer Ping Test Ping is a small program that sends data packets to the IP address you specify The destination node then returns the packets to the switch This is very useful to verify connectivity...

Страница 58: ...andwidth being used on the port Port Utilization statistics may be viewed using the table format To view the port utilization click Basic Setup Network Monitoring Statistics Port Utilization Figure 5...

Страница 59: ...in new browser The following fields are displayed TX transmit Parameter Description CRC Error Counts otherwise valid frames that did not end on a byte octet boundary Undersize The number of frames de...

Страница 60: ...ingle Collision Frames The number of successfully transmitted frames for which transmission is inhibited by more than one collision Collision An estimate of the total number of collisions on this netw...

Страница 61: ...256 511 The total number of packets including bad packets received that were between 256 and 511 octets in length inclusive excluding framing bits but including FCS octets 512 1023 The total number of...

Страница 62: ...adcast RX Displays the number of broadcast packets received by the Switch in total number Frames and the rate Frames sec MAC Address Table This allows the switch s dynamic MAC address forwarding table...

Страница 63: ...Browse button The following fields can be viewed in the table to the right Parameter Description VID The VLAN ID number VLAN Name The VLAN name MAC Address The MAC address entered into the address tab...

Страница 64: ...ed as router ports A router port configured by a user using the console or Web based management interfaces is displayed as a static router port designated by S A router port that is dynamically config...

Страница 65: ...the Multicast Group IP address and the corresponding MAC address from IGMP packets that pass through the Switch The ports where the IGMP packets were snooped are displayed signified with an M The num...

Страница 66: ...bottom of the window will allow you to display all the switch Trap Logs The information is described as follows Parameter Description Sequence A counter incremented whenever an entry to the Switch s...

Страница 67: ...Diagnostics Table window 802 1X Auth Statistics This is a read only field is used to display the authenticator statistics information on the switch To view this window click Basic Setup Network Monit...

Страница 68: ...X Auth Session Statistics window 802 1X Auth Client This is a read only field is used to display the RADIUS Auth Client information on the switch To view this window click Basic Setup Network Monitori...

Страница 69: ...n screen instructions for the differences among each option Note that all changes are kept in normal memory If a user does not save the result into NV RAM with the Save Changes function the switch wil...

Страница 70: ...es window Restart System Figure 5 44 Restart System window Logout To logout off the switch click the Logout link under the Basic Setup folder which will present the following screen Figure 5 45 Web Lo...

Страница 71: ...n 6 Advanced Setup Port Segmentation Spanning Tree Forwarding Configure QoS Mirroring Configurations VLAN Configurations Link Aggregation 802 1x System Log Multicast Configurations SSH Management Port...

Страница 72: ...this switch as follows STP Switch Settings To globally configure STP on the Switch under Advanced Setup click Spanning Tree and then STP Switch Settings Figure 6 2 STP Switch Settings window The Switc...

Страница 73: ...o the forwarding state PRIORITY 0 61440 32768 A Bridge Priority can be from 0 to 61 440 Zero is equal to the highest Bridge Priority STP VERSION Choose RSTP or STP compatible Both versions use STP par...

Страница 74: ...Port Settings To configure STP Port Settings on the Switch under Advanced Setup click Spanning Tree and then STP Port Settings Figure 6 3 STP Port Table window Select an entry on the STP Port Table an...

Страница 75: ...s cannot create loops however an edge port can lose edge port status if a topology change creates a potential for a loop An edge port normally should not receive BPDU packets If a BPDU packet is recei...

Страница 76: ...d 765 seconds Note A very long Aging Time can result with the out of date Dynamic Entries that may cause incorrect packet filtering forwarding decisions A very short aging time may cause entries to be...

Страница 77: ...queues are empty are packets of lower priority transmitted For weighted round robin queuing the number of packets sent from each priority queue depends upon the assigned weight For a configuration of...

Страница 78: ...priorities Figure 6 7 802 1p User Priority window Once you have assigned a priority to the port groups on the switch you can then assign this Class to each of the eight levels of 802 1p priorities No...

Страница 79: ...t Ethernet Switch User s Guide Bandwidth Control Table Figure 6 8 Bandwidth Control Table window The bandwidth control settings are used to place a ceiling on the transmitting and receiving data bit r...

Страница 80: ...nd enter the desired rate Rates can be expressed using whole numbers up to the maximum available rate for the port Mirroring Configurations The Switch allows you to copy frames transmitted and receive...

Страница 81: ...802 1p standard designed to provide a means of managing traffic on a network where many different types of data may be transmitted simultaneously It is intended to alleviate problems associated with t...

Страница 82: ...at appears as a single LAN VLANs also logically segment the network into different broadcast domains so that packets are forwarded only between ports within the VLAN Typically a VLAN corresponds to a...

Страница 83: ...s VLANs can also provide a level of security to your network IEEE 802 1Q VLANs will only deliver packets between stations that are members of the VLAN Any port can be configured as either tagging or u...

Страница 84: ...ag The tag is contained in the following two octets and consists of 3 bits of user priority 1 bit of Canonical Format Identifier CFI used for encapsulating Token Ring packets so they can be carried ac...

Страница 85: ...that are tagged are carrying the 802 1Q VID information can be transmitted from one 802 1Q compliant network device to another with the VLAN information intact This allows 802 1Q VLANs to span network...

Страница 86: ...ill drop the packet Because of the existence of the PVID for untagged packets and the VID for tagged packets tag aware and tag unaware network devices can coexist on the same network A switch port can...

Страница 87: ...port If it does not the packet is dropped If it has the same VID the packet is forwarded and the destination port transmits it on its attached network segment This process is referred to as ingress fi...

Страница 88: ...then the packet will be dropped by the switch and will not reach its destination If Port 10 is a member of VLAN 2 the packet will go through This selective forwarding feature based on VLAN criteria i...

Страница 89: ...he user may use the pull down menu to choose between 802 1Q VLAN and Port Based VLAN After choosing a different VLAN mode click Apply and the Switch will have to reboot to apply the settings Switch GV...

Страница 90: ...Parameter Description VLAN ID VID The VLAN ID of the VLAN that was created VLAN Name The name of the VLAN that is being created VLAN Type This indicates the type of VLAN static or LACP Advertisement E...

Страница 91: ...which will reveal the following screen Note The Switch s default is to assign all ports to a single VLAN named default As new VLANs are created the member ports assigned to the new VLAN will be remov...

Страница 92: ...al port to be specified as a non VLAN member Tagged Untagged Allows an individual port to be specified as Tagged or Untagged A check in the Tagged field specifies the port as a Tagging member of the V...

Страница 93: ...in the packet before forwarding the packet GARP VLAN Registration Protocol GVRP is a Generic Attribute Registration Protocol GARP application that provides 802 1Q compliant VLAN pruning and dynamic VL...

Страница 94: ...D of incoming packets If not the ingress checking will drop the packets Port Based VLANs If you have chosen Port Based VLAN the heading Port Based VLAN will appear in the VLAN Configuration folder Cli...

Страница 95: ...corresponding radio button of the VLAN entry and press the Edit button revealing the following window Figure 6 22 Port Based VLANs entry Settings Edit window After altering the Port Members of your Po...

Страница 96: ...ports cannot have a trunk connection with the Switch Note If the two external module ports are used as a trunk group and either port is disconnected packets intended for the disconnected port will be...

Страница 97: ...on group Load balancing is automatically applied to the ports in the aggregated group and a link failure within the group causes the network traffic to be directed to the remaining links in the group...

Страница 98: ...existing entry Type Toggle to determine which type of link aggregation to use Static or LACP Master Port The Master port of link aggregation group Status This field can be toggled between Enabled and...

Страница 99: ...it receives but does not initiate LACP negotiation This is the default Active LACP mode that places a port into an active negotiating state in which the port initiates negotiations with other ports by...

Страница 100: ...User s Guide To edit an LACP Port Table entry select it and then click Edit Figure 6 26 Lacp Port Setting window Select the desired port mode and range of ports to be configured and then click Apply...

Страница 101: ...See the following figure Figure 6 28 Typical 802 1x Configuration Prior to User Authentication Once the user is authenticated the Switch unblocks the port that is connected to the user as shown in th...

Страница 102: ...6 2 Conformance to IEEE 802 1x Standards The DES 3226L implements the server side of the IEEE 802 1x Port based Network Access Control This mechanism is intended to allow only authorized users or othe...

Страница 103: ...allows the user to enable or disable the 802 1x Port Based Network Access control server application on the switch When the 802 1x function is disabled authentication packets are flooded to all ports...

Страница 104: ...thernet Switch User s Guide Click the radio button on the far left that corresponds to the port you want to configure and click the Edit button The following window will appear Figure 6 33 802 1x Port...

Страница 105: ...he administrative control over the port s authorization status Force_Authorized forces the Authenticator of the port to become Authorized Force_Unauthorized forces the port to become Unauthorized Auto...

Страница 106: ...ed reauthentication Choose the port or group of ports using the pull down menu and click Reauthenticate to start the process 802 1X Initialize Ports Figure 6 35 802 1X Initialize Ports window This win...

Страница 107: ...tion Index RADIUS server settings index IP Address Type in the IP address of the RADIUS server Key Type the shared secret key used by the RADIUS server and the switch Up to 32 characters can be used A...

Страница 108: ...tate to enable this function System Log State Figure 6 40 System Log State window To enable the System Log Server settings you have chosen on the System Log Server window select Enabled and click the...

Страница 109: ...in the following Bold font means the facility values the switch supports now Numerical Facility Code 0 kernel messages 1 user level messages 2 mail system 3 system daemons 4 security authorization mes...

Страница 110: ...e window Internet Group Management Protocol IGMP snooping allows the Switch to recognize IGMP queries and reports sent between network stations or devices and an IGMP host When enabled for IGMP snoopi...

Страница 111: ...DES 3226L Layer 2 Fast Ethernet Switch User s Guide Figure 6 45 IGMP Snooping Configurations Edit window 99...

Страница 112: ...he value of the robustness variable By default the robustness variable is set to 2 The user may wish to increase this value if the subnet loses packets frequently Last Member Query Interval 1 65535 Th...

Страница 113: ...services over an insecure network It allows you to securely login to remote host computers to execute commands safely in a remote computer and so forth and to provide secure encrypted and authenticat...

Страница 114: ...the Secure Shell protection SSH Global Figure 6 49 SSH Configure window The SSH Configure window contains the global server setting maximum simultaneous sessions connection timeout maximum fail attemp...

Страница 115: ...cify the methods of user authentication supported by server Key Re Exchange Timeout minute Use the pull down menu to choose the timeout period for the Key Re Exchange The user may choose between Never...

Страница 116: ...226L Layer 2 Fast Ethernet Switch User s Guide Figure 6 51 SSH Accounts Add window The SSH Accounts Add window can be used to specify user name new password authentication method host name and host IP...

Страница 117: ...IEEE 802 3ab Gigabit Ethernet IEEE 802 1Q Tagged VLAN IEEE 802 1P Tagged Packets IEEE 802 3ab 1000BASE T IEEE 802 3x Full duplex Flow Control ANSI IEEE 802 3 NWay auto negotiation Protocols CSMA CD Da...

Страница 118: ...s max EIA TIA 568 150 ohm STP 100 meters max UTP Cat 5e 100 meters max UTP Cat 5 100 meters max EIA TIA 568B 150 ohm STP 100 meters max Single mode fiber module 10km Multi mode fiber module 550m Singl...

Страница 119: ...ce Packet Filtering Forwarding Rate Full wire speed for all connections 1 488 095 pps per port for 1000Mbps MAC Address Learning Automatic update Supports 4K MAC address Priority Queues 2 Priority Que...

Страница 120: ...iagrams and tables show the standard RJ 45 receptacle connector and their pin assignments The standard RJ 45 port and connector RJ 45 Pin Assignments Contact MDI X Port MDI II Port 1 RD receive TD tra...

Страница 121: ...ASE LX Single mode fiber module 10km 1000BASE SX Multi mode fiber module 550m 1000BASE LHX Single mode fiber module 40km Mini GBIC 1000BASE ZX Single mode fiber module 80km 1000BASE T Category 5e UTP...

Страница 122: ...e normally used to connect the Switch to the backbone of your network Note that backbone ports were formerly known as designated downlink ports backbone The part of a network used as the primary path...

Страница 123: ...ransmitted and received but not at the same time Contrast with full duplex IP address Internet Protocol address A unique identifier for a device attached to a network using TCP IP The address is writt...

Страница 124: ...olerance on networks STP works by allowing you to implement parallel paths for network traffic and ensure that redundant paths are disabled when the main paths are operational and enabled if the main...

Страница 125: ...VLT Virtual LAN Trunk A Switch to Switch link which carries traffic for all the VLANs on each Switch VT100 A type of terminal which uses ASCII characters VT100 screens have a text based appearance 113...

Страница 126: ...0 85182250 URL www dlink com cn Denmark D Link Denmark Naverland 2 DK 2600 Glostrup Denmark TEL 45 43 96 90 40 FAX 45 43 42 43 47 URL www dlink dk Egypt D Link Egypt 19 El Shahed Helmy El Masry Al Maz...

Страница 127: ...665 2186 URL www d link co za Spain D Link Iberia C Sabino de Arana 56 Bajos 08028 Barcelona Spain TEL 34 93 409 0770 FAX 34 93 491 0795 URL www dlink es Sweden D Link Sweden P O Box 15036 S 167 15 B...

Страница 128: ...eitung keine Verbesserung erzielen e Das Ger t ist gefallen und oder das Geh use ist besch digt f Wenn das Ger t deutliche Anzeichen eines Defektes aufweist 16 Bei Reparaturen d rfen nur Orginalersatz...

Страница 129: ...ackage returned to D Link without an RMA number will be rejected and shipped back to Purchaser at Purchaser s expense and D Link reserves the right in such a case to levy a reasonable handling charge...

Страница 130: ...of Warranty The Limited Warranty provided hereunder for Hardware and Software portions of D Link s products will not be applied to and does not cover any refurbished product and any product purchased...

Страница 131: ...s and exclusions may not apply This Limited Warranty provides specific legal rights and you may also have other rights which vary from state to state Trademarks D Link is a registered trademark of D L...

Страница 132: ...ISTRATION Register online your D Link product at http support dlink com register Product registration is entirely voluntary and failure to complete or return this form will not diminish your warranty...

Страница 133: ...________________________ 4 What network operating system s does your organization use D Link LANsmart Novell NetWare NetWare Lite SCO Unix Xenix PC NFS 3Com 3 Open Banyan Vines DECnet Pathwork Windows...

Страница 134: ...122...

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