NETGEAR SW510 - Switch User manual

M-SW510NA-1
September 2000
NETGEAR , Inc.
4500 Great America Parkway
Santa Clara, CA 95054
USA
Phone: 1-888-NETGEAR
E-mail: [email protected]
www.NETGEAR.com
Installation Guide for
the Model SW510
and Model SW518
Ethernet Switches

ii
© 2000 by NETGEAR, Inc. All rights reserved.
Trademarks
NETGEAR™ is a trademark of NETGEAR, Inc. Windows® is a registered trademark of Microsoft Corporation. Other
brand and product names are trademarks or registered trademarks of their respective holders. Information is subject to
change without notice. All rights reserved.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to
make changes to the products described in this document without notice.
NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit
layout(s) described herein.
Federal Communications Commission (FCC) Declaration of Conformity Statement
Note: This equipment has been tested and found to comply with the limits for a ClassA digital device, pursuant to
Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy. If it is not installed and used in accordance with the instruction manual, it may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which
case users will be required to take whatever measures may be necessary to correct the interference at their own expense.
EN 55 022 Statement
This is to certify that the NETGEAR Model SW510 and Model SW518 Ethernet Switches are shielded against the
generation of radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a.
Conformity is declared by the application of EN 55 022 Class A (CISPR 22).
Bestätigung des Herstellers/Importeurs
Es wird hiermit bestätigt, daß das NETGEAR Model SW510 and Model SW518 Ethernet Switches gemäß der im
BMPT-AmtsblVfg 243/1991 undVfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben
einiger Geräte (z.B. Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die
Anmerkungen in der Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt
gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
Warning: This is a Class A product. In a domestic environment, this product may
cause radio interference, in which case, the user may be required to take appropriate
measures.

iii
Voluntary Control Council for Interference (VCCI) Statement
This equipment is in the first category (information equipment to be used in commercial and/or industrial areas) and
conforms to the standards set by the Voluntary Control Council for Interference by Data Processing Equipment and
Electronic Office Machines that are aimed at preventing radio interference in commercial and/or industrial areas.
Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio interference may be
caused to equipment such as radios and TV receivers.
Customer Support
For assistance with installing and configuring your NETGEAR system or with post-installation questions or problems,
contact your point of purchase representative.
To contact customer support or to purchase additional copies of this document and publications for other NETGEAR
products, you can contact NETGEAR at the following numbers:
Phone:
Australia 1800-787-638 Korea 00308-11-0319
Austria 00800-06384327 Netherlands 0800-023-0981
(00800-0-NETGEAR) New Zealand 00800-1233-4566
Denmark 808-82179 Norway 800-12041
Canada 1-888-NETGEAR Singapore 001-800-1233-4566
Finland 0800-111-036 Sweden 0200-298-298
France 0800-77-17-53 Switzerland 00800-0638-4327
Germany 00800-06384327 (00800-0-NETGEAR)
(00800-0-NETGEAR) United Kingdom 020-7216-0014
Hong Kong 001-800-1233-4566 United States 1-888-NETGEAR
Japan 0120-66-5402 All Other Countries [phone]
World Wide Web
NETGEAR maintains a World Wide Web home page that you can access at the universal resource locator (URL)
http://www.NETGEAR.com. A direct connection to the Internet and a Web browser such as Internet Explorer or
Netscape are required.

iv

Contents v
Contents
Chapter 1
Introduction
Benefits of Using Switching Technology .........................................................................1-1
Overview of the Switches ...............................................................................................1-1
Features .........................................................................................................................1-2
Chapter 2
Physical Description
Front Panel .....................................................................................................................2-1
Ethernet Ports ..........................................................................................................2-2
Normal/Uplink Push Button ......................................................................................2-3
LEDs ........................................................................................................................2-4
Rear Panel ......................................................................................................................2-5
HDX/FDX/AUTO Duplex Toggle Switches ................................................................2-6
Chapter 3
Applications
Desktop Switching ..........................................................................................................3-1
Network Segmentation ...................................................................................................3-2
Bridging from 10 Mbps to 100 Mbps Networks ...............................................................3-4
Chapter 4
Installation
Site Preparation ..............................................................................................................4-1
Package Contents ..........................................................................................................4-1
Installing a Switch ...........................................................................................................4-2
Installing the Switch on a Flat Surface .....................................................................4-2
Installing the Switch in a Rack .................................................................................4-3
Connecting Devices to the Switch ..................................................................................4-4
Verifying Installation ........................................................................................................4-6

vi Contents
Chapter 5
Troubleshooting
LEDs ...............................................................................................................................5-1
HDX/FDX/AUTO Duplex Toggle Switches ......................................................................5-1
Installation ......................................................................................................................5-2
Cabling ...........................................................................................................................5-2
Network Adapter Cards ..................................................................................................5-2
Configuration ..................................................................................................................5-2
Switch Integrity ...............................................................................................................5-2
Appendix A
Technical Specifications
General Specifications ................................................................................................... A-1
Appendix B
Connector Pin Assignments
RJ-45 Plug and vista RJ-45 Connector ......................................................................... B-1
Appendix C
Ethernet and Cabling Guidelines
Ethernet Technology ......................................................................................................C-1
Cable Specifications ......................................................................................................C-2
Twisted Pair Cables .......................................................................................................C-2

Figures vii
Figures
Figure 2-1. Front panel of the Model SW510 switch ..................................................2-1
Figure 2-2. Front panel of the Model SW518 switch ..................................................2-2
Figure 2-3. The vista RJ-45 connector with built-in LEDs ..........................................2-3
Figure 2-4. Rear panel of the Model SW510 switch ...................................................2-5
Figure 2-5. Rear panel of the Model SW518 switch ...................................................2-5
Figure 3-1. Model SW510 switch used as a desktop switch ......................................3-2
Figure 3-2. Model SW518 switches used for network segmentation and as a
multiport bridge to a high-bandwidth backbone .......................................3-3
Figure 3-3. Bridging from 10 Mbps networks .............................................................3-4
Figure 4-1. Attaching mounting brackets to the Model SW510 and
Model SW518 switches ............................................................................4-3
Figure B-1. RJ-45 plug and vista RJ-45 connector .................................................... B-1
Figure C-1. Straight-through twisted pair cable .........................................................C-3
Figure C-2. Crossover twisted pair cable ...................................................................C-3

viii Tables
Tables
Table 2-1. LED descriptions ......................................................................................2-4
Table B-1. Pin assignments for the RJ-45 plug and vista RJ-45 connector ............. B-2
Table C-1. Electrical requirements of Category 3, 4, and 5 cables ..........................C-2

Introduction 1-1
Chapter 1
Introduction
Congratulations on your purchase of the NETGEAR Model SW510 10-port 10/100 Mbps Ethernet
Switch or the NETGEAR Model SW518 18-port 10/100 Mbps Ethernet Switch. These switches
are part of the NETGEAR
™
500-series product family. The switches allow simultaneous
transmission of multiple packets through an internal high-speed data channel, improving the
overall information throughput and productivity of a network environment.
Benefits of Using SwitchingTechnology
Ethernet switches increase network throughput by segmenting network traffic. Instead of 10 PCs
all sharing a single 10 megabit per second (Mbps) network connection with an average of 1 Mbps
per PC, a 10-port switch provides the same 10 PCs with 10 Mbps individually. By using the
10-port switch, performance increases up to tenfold and is done with no change in network wiring,
adapters, or software.As a result, performance upgrade is obtained very quickly and at a low cost.
Overview of the Switches
The Model SW510 and Model SW518 switches can be utilized as either segment switches or
desktop switches. A
segment switch is designed to support an entire workgroup on each port, with
each port having significant memory buffering and supporting hundreds of addresses (one or more
addresses per PC). A segment switch also provides significant performance benefits over a shared
hub. A
desktop switch is designed to support one or a few PCs per port. A desktop switch is
generally used where individuals within workgroups need 10 Mbps network throughput but also
require 100 Mbps access.
The design of the Model SW510 and Model SW518 switches enables the use of the devices in the
most demanding segment switching applications, yet pricing makes them very affordable for use
in desktop applications.

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
1-2 Introduction
Increased bandwidth is another advantage of the Model SW510 and Model SW518 switches. In
addition to 10 Mbps ports, each switch has two Fast Ethernet ports that create a high-throughput
connection to a backbone or server with 100 Mbps transmission. In addition to partitioning an
overloaded network, the switches provide a link between traditional 10BASE-T and the faster
100BASE-TX networks. All ports on the switches can operate in either full-duplex or half-duplex
data transfer mode to support the interconnection requirements of other high-speed devices.
Up to nine switching paths (18 paths in full-duplex mode) can be established at the same time,
with each path crossing two ports, performing switching that sends packets to the appropriate port
according to the destination address scanned from the packet header. This technique reduces the
latency of packet transmission to 75 microseconds ( µ
s) or less. Compared to approximately 800 µ s
for a bridge or 1800 µ
s for a router, the Model SW510 and Model SW518 switches deliver a major
improvement in the performance of your network.
Because the Model SW510 and Model SW518 switches are devices functioning on the media
access control (MAC) layer, they are protocol independent and are compatible with IEEE802.3,
IEEE802.3u, TCP/IP, NetWare, DECnet, and XNS protocols. Each of these switches can be
configured easily in most environments as a standalone device to form a workgroup consisting of
10 to 18 subnetworks or workstations, as a simple twisted-pair LAN, or as a multiport bridge.With
their low port-to-port latency and high forwarding efficiency, the Model SW510 and Model
SW518 switches can also be connected to other switching hubs.
The maximum distance between end nodes is not restricted as it was with the traditional repeaters.
Dividing your network into smaller and more manageable segments, each linked to the larger
network with a switch, creates a maximum distance for communications between end nodes that is
unlimited.
Features
The Model SW510 and Model SW518 switches have the following key features:
• Use in segment or desktop applications
Network productivity is improved by segmenting network traffic or providing private 10 Mbps
access to the desktop or server, with no changes to the software or network interface.
• Eight 10 Mbps unshielded twisted pair (UTP) Ethernet ports on the Model SW510 switch;
Sixteen 10 Mbps UTP Ethernet ports on the Model SW518 switch
One of the 10 Mbps UTP ports is configurable as Normal (MDI-X) or Uplink (MDI).

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
Introduction 1-3
• Two 10/100 Mbps ports on each of the switches
One of the 10/100 Mbps ports is configurable as Normal (MDI-X) or Uplink (MDI).
• Switch-selectable half/full-duplex mode for the 10 Mbps ports
In full-duplex mode, the throughput of point-to-point connections is doubled by enabling
individual ports to transmit and receive concurrently when the other end also supports
full-duplex mode.
• Auto- or full-duplex mode for the 10/100 Mbps ports:
— Auto-negotiable between full-duplex and half-duplex mode when set in auto-duplex mode
The mode will default to half-duplex transmission if the remote end cannot provide a
proper signal to indicate its own capability.
— Can be set to full-duplex mode permanently for interoperability with legacy 100BASE-TX
devices
• Wire-speed filtering and forwarding to provide “traffic cop” function by directing traffic to the
appropriate route without slowing down the traffic
• Plug-and-Play operation with no software to configure
• Low latency store-and-forward transmission mode with leading edge to leading edge of less
than 75 µ
s
• Ten vista RJ-45 connector ports on the Model SW510 and eighteen vista RJ-45 connector
ports on the Model SW518 switch
Each port has built-in LEDs to monitor individual port status.
• Comprehensive LED indicator panel to monitor overall switching condition
• Auto address learning function to build the routing information database
The routing table contains 8,000 Ethernet address entries per port to store MAC addresses for
attached network nodes.
• 2-megabyte (MB) buffer provided for the 10 Mbps ports on the Model SW518 and 1 MB
buffer provided for the 10 Mbps ports on the Model SW510, with an additional 2 MB of buffer
memory for the two 10/100 Mbps ports
• Conformity to the ISO/IEC 8802-3 and ANSI/IEEE 802.3 10BASE-T standards
• Conformity to the IEEE 802.3u 100BASE-TX standard
• Rack Mount Kit provided for installing the switch in a standard 19-inch rack

Physical Description 2-1
Chapter 2
Physical Description
This chapter explains the hardware features of the NETGEAR Model SW510 and Model SW518
Ethernet switches. It is divided into sections explaining the front and rear panels of the switches.
Use the key at the bottom of each illustration to identify the panel components.
Front Panel
For easier management and control of the switches, familiarize yourself with the ports, LEDs, and
Normal/Uplink push button switches, as illustrated in Figure 2-1 and Figure 2-2 showing the front
panels of the switches.
Key:
1 = Power LED
2 = Rx/Tx and Collision LEDs for ports 1 through 10
3 = 100 Mbps LEDs for ports 9 and 10
4 = 10 Mbps Ethernet ports1 through 8 with Link and FDX LEDs on each port
5 = Normal/Uplink push button to configure port 8
6 = 10/100 Mbps Ethernet ports 9 and 10 with Link and FDX LEDs on each port
7 = Normal/Uplink push button to configure port 10
Figure 2-1. Front panel of the Model SW510 switch
1234 5678 910
Link FDX Link FDX Link
10/100 Mbps
FDX
592EA
Power 1234 5678 910
100Mbps
Normal/UplinkNormal/Uplink
2 6
4
3 5 7
1
Green = Rx/Tx Yellow = Collision
10 PORT
10/100Mbps Ethernet Switch
SW510
MODEL
10/100 Mbps

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
2-2 Physical Description
Key:
1 = Power LED
2 = Rx/Tx and Collision LEDs for ports 1 through 18
3 =100 Mbps LEDs for ports 17 and 18
4 =10 Mbps Ethernet ports with Link and FDX LEDs on each port
5 = Normal/Uplink push button to configure port 16
6 =10/100 Mbps Ethernet ports 17 and 18 with Link and FDX LEDs on each port
7 = Normal/Uplink push button to configure port 18
Figure 2-2. Front panel of the Model SW518 switch
Ethernet Ports
The Model SW510 switch is equipped with eight 10 Mbps Ethernet ports and two 10/100 Mbps
Fast Ethernet ports. On the Model SW518 switch, there are sixteen 10 Mbps ports and two 10/100
Mbps ports. A server or PC can be connected to any of the ports.
The 10/100 Mbps ports are Ports 9 and 10 on the Model SW510 switch and Ports 17 and 18 on the
Model SW518 switch. The network access speed for the two 10/100 Mbps ports on both systems is
automatically sensed and displayed on the front panel by the 100 Mbps LEDs.
The 10 Mbps and 10/100 Mbps ports support only one cable connection, which is for unshielded
twisted pair (UTP) cable. An 8-pin RJ-45 plug is used for connection to this port.
8
16 17 18
1
9
Link FDX Link FDX Link FDX
593EA
Power 910 11 12 13 14 15
Green = Rx/Tx Yellow = Collision
16
1234 5678
17 18
100 Mbps
Normal/UplinkNormal/Uplink
18 PORT
10/100Mbps
Ethernet Switch
SW518
MODEL10/100 Mbps
26
45 7
13
10/100 Mbps

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
Physical Description 2-3
Each of the 10 Mbps and 10/100 Mbps ports uses vista RJ-45 connectors that have built-in LEDs,
as illustrated in Figure 2-3. The LEDs, as described in Table 2-1, indicate that the connection to
the port is valid and that the port is operating in full-duplex mode.
For further information about the vista RJ-45 connector and the RJ-45 plug, refer to Appendix B,
“Connector Pin Assignments.”
Key:
1 = Link LED
2 = FDX LED
Figure 2-3. The vista RJ-45 connector with built-in LEDs
Normal/Uplink Push Button
As illustrated in Figure 2-1 and Figure 2-2, one 10 Mbps port and one of the 10/100 Mbps ports on
each of the switches is equipped with a Normal/Uplink push button that allows you to select
normal (MDI-X) wiring or uplink (MDI) wiring. On the Model SW510 switch, ports 8 and 10 can
be configured for normal or uplink wiring; on the Model SW518 switch, ports 16 and 18 can be
configured for normal or uplink wiring. The ports are configured for normal wiring when the push
button is in the out position.When the push button is pressed in, the ports are configured for uplink
wiring. Configuring the ports allows direct connection to a server or PC, or to another switch or a
hub to form a network backbone.
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1 2

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
2-4 Physical Description
LEDs
The LEDs on the Model SW510 and the Model SW518 switches are used to monitor and diagnose
the devices. LEDs on the front panel of the switch and two LEDs on each port allow you to
identify the following information:
•Status of the switch power supply
•Data transmission or receive activity
•Collision occurrence
•Full- or half-duplex transmission
Table 2-1 describes each LED on the front panels of the switches. See Figure 2-1, Figure 2-2, and
Figure 2-3 for the locations of the LEDs.
Table 2-1. LED descriptions
Label Color Activity Description
Power Green On Power is supplied to the switch.
Off Power is disconnected.
Rx/Tx/Collision Green Blinking Packet transmission or reception is occurring on the port.The
blinking action corresponds to the amount of packets that are
transmitted or received.
Yellow Blinking Data collision is occurring on the port.The blinking action
corresponds to the amount of collisions.
When a collision occurs, the connected device pauses and
transmits again after waiting a specified time.
Link Green On A valid link is established on the port.
Off A link is not established on the port.
FDX Green On The port is operating in full-duplex mode.
Off The port is operating in half-duplex mode.
100 Mbps Green On The port is operating at 100 Mbps.The 100 Mbps LEDs are
only applicable to ports 9 and 10 on the Model SW510 switch
and ports 17 and 18 on the Model SW518 switch.
Off The port is operating at 10 Mbps.The 100 Mbps LEDs are
only applicable to ports 9 and 10 on the Model SW510 switch
and ports 17 and 18 on the Model SW518 switch.

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
Physical Description 2-5
Rear Panel
As illustrated in Figure 2-4 and Figure 2-5, the rear panel has full-duplex (FDX), half-duplex
(HDX), and auto-duplex (AUTO) toggle switches, a standardAC power receptacle, and fans for
cooling.
Key:
1 = FDX and HDX toggle switches to set 10 Mbps ports 1 through 8 for full- or half-duplex mode
2 = FDX and AUTO toggle switches to set 10/100 Mbps ports 9 and 10 for full- or auto-duplex mode
3 = Fans
4 = AC power outlet
Figure 2-4. Rear panel of the Model SW510 switch
Key:
1 = FDX and HDX toggle switches to set 10 Mbps ports 1 through 16 for full- or half-duplex mode
2 = FDX and AUTO toggle switches to set 10/100 Mbps ports 17 and 18 for full- or auto-duplex mode
3 = Fans
4 = AC power outlet
Figure 2-5. Rear panel of the Model SW518 switch
595EA
3
4
WARNING -
AUTO -
FDX, HDX -
Whenever a port changes between FDX and HDX mode, entire unit resets
and traffic in all ports will be stopped temporarily
Enable port to determine duplex mode automatically
Force port to operate at Full Duplex and Half Duplex mode respectively
18
FDX
HDX
10 Mbps 910
FDX
AUTO
10/100 Mbps
1 2
596EA
18916
3
4
WARNING -
AUTO -
FDX, HDX -
Whenever a port changes between FDX and HDX mode, entire unit resets
and traffic in all ports will be stopped temporarily
Enable port to determine duplex mode automatically
Force port to operate at Full Duplex and Half Duplex mode respectively
FDX
HDX
10 Mbps 1718 FDX
AUTO
10/100 Mbps
1 2

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
2-6 Physical Description
HDX/FDX/AUTO DuplexToggle Switches
Full-duplex mode is supported for all 10 Mbps or 10/100 Mbps ports and allows the port to
transmit and receive data at the same time. Full-duplex operation applies only to point-to-point
access (for example, when a switch is connected to a PC, a server, or another switch). Because
repeaters and hubs use a common collision domain for all communications and cannot
communicate in a full-duplex mode, the associated 10 Mbps port on the switch should be set to
half-duplex operation when connecting to these types of devices.
Setting the toggle switch to AUTO on the 10/100 Mbps port enables the port to determine duplex
mode automatically. In this mode, the 10/100 Mbps port operates in either full- or half-duplex
mode, depending on the operating mode of the remote port. If the remote port cannot provide the
proper signal to indicate its own capability, the 10/100 Mbps port on the switch operates in
half-duplex mode.
As illustrated in Figure 2-4 and Figure 2-5, one half-duplex (HDX) and full-duplex (FDX) toggle
switch is assigned to each 10 Mbps port on a switch. On the Model SW510 switch, the 10 Mbps
ports are ports 1 through 8; on the Model SW518 switch, the 10 Mbps ports are ports 1 through 16.
The communication mode can be set to either half-duplex or full-duplex mode.
One FDX and AUTO toggle switch is assigned to each 10/100 Mbps port on a switch. On the
Model SW510 switch, the 10/100 Mbps ports are ports 9 and 10; on the Model SW518 switch, the
10/100 Mbps ports are ports 17 and 18.The communication mode can be set to either full-duplex
or auto-duplex mode.

Applications 3-1
Chapter 3
Applications
This chapter presents an overview of the levels of service provided by incorporating the
technology of the NETGEAR Model SW510 and Model SW518 Ethernet switches into your
network. Examples are given to illustrate the role of the switch in several configurations that
provide those different levels of service to networks and users.
The Model SW510 and Model SW518 switches are designed to provide flexibility in configuring
your network connections. The switch can be used as a standalone device or can be connected with
standard repeaters, switching hubs, or other interconnection devices in various configurations. The
configuration examples in this chapter illustrate the integration of the switch in network
environments of all sizes and types. These examples include a network of a few workstations
connected to a printer and a segmented network with multiple users and other networking devices.
Desktop Switching
The Model SW510 and Model SW518 switches are designed to perform the functions of a desktop
switch where a small group of users need to be assured of having 10 Mbps network access. A
power user on the same network can have a 100 Mbps connection to the switch and a 200 Mbps
connection to the server. Figure 3-1 illustrates PCs connected to the 10 Mbps Ethernet ports of a
Model SW510 Ethernet switch. The power user and the server are connected to the 10/100 Mbps
ports.

Installation Guide for the Model SW510 and Model SW518 Ethernet Switches
3-2 Applications
Key:
1 = Model SW510 Ethernet switch (Normal/Uplink push button for port 10 set to Normal position)
2 = Server with 200 Mbps connection
(adapter card installed in server that negotiates auto-duplex mode)
(duplex toggle switch for port 9 on Model SW510 switch set in AUTO position to enable auto-duplex mode)
3 = PC with 100 Mbps connection
4 = PCs with 10 Mbps connection
Figure 3-1. Model SW510 switch used as a desktop switch
Network Segmentation
Most networks are interconnected with two-port bridges that insert latency into normal
communications. For data that must pass through several bridges to reach its destination, this
latency can degrade communications. With several 10 Mbps bridging ports and the additional
internally bridged 100 Mbps port, the Model SW518 switch can segment a complex network into a
single efficient bridged node, increasing overall bandwidth and throughput. Segments attached to
the switching hub do not have to cross the backbone. They can now reach each other at near-zero
latency. For high-bandwidth applications that transfer data across the network backbone, the
100 Mbps port provides high-speed access.
The switch increases bandwidth for workgroups and strengthens network throughput when
accessing high-volume file servers. The Model SW518 switch provides parallel communication
between the high-speed 100 Mbps port and each of the 10 Mbps station ports. This method of
communication allows multiple conversations to occur concurrently. This method also expands
overall throughput and allows key servers or other heavily used devices to be available to more
users. Figure 3-2 illustrates the Model SW518 Ethernet switch connected to NETGEAR
Model EN516 Ethernet hubs, each supporting a network of users. A NETGEAR Model FS508
Fast Ethernet switch serves as the network backbone.
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1
4
32