Networking


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	Networking


	-Installing a Network Interface Card (NIC)


	Installing for use in Concord's Residence Halls


	3Com EtherLink III PCI NIC (.pdf format)


	3Com EtherLink III ISA NIC (.pdf format)


	3Com Fast EtherLink XL 10/100 NIC (.pdf format)


	Drivers EtherLink III PCI Disk1


	Drivers EtherLink III ISA Disk1 Disk2


	Other 3Com NIC Drivers


	Drivers Fast EtherLink XL 10/100 Disk1 Disk2 Disk3


	Copy the file to an empty folder/directory and execute the extraction by double-clicking the file name. Select all the files and folders (except for the original) and copy to a floppy disk. Label and repeat for each disk.


	-Using the Proper Cable


	For This Connection ------------------------------------ workstation to workstation workstation to server workstation to hub workstation to switch server to hub server to switch hub to switch switch to switch


	Use This Cable ------------------------------- crossover crossover straight-through (568B) straight-through (568B) straight-through (568B) straight-through (568B) crossover crossover


	-How to make a 568B straight-through cable


	Strip insulation back about 2 inches and arrange the wires as shown below from left to right. Cut excess until about 1/2 inch is left (important), be sure wires are cut evenly across. Insert into connector (clip down) firmly until wires reach the end, make sure insulation is pushed inside the connector. Crimp with good crimp tool and test.




		Hold connector clip down


	Use This Wiring Order

Pin	Wire Colors on End 1	Wire Colors on End 2
1	White/Orange	White/Orange
2	Orange/White	Orange/White
3	White/Green	White/Green
4	Blue/White	Blue/White
5	White/Blue	White/Blue
6	Green/White	Green/White
7	White/Brown	White/Brown
8	Brown/White	Brown/White


	-How to make a crossover cable


	Strip insulation back about 2 inches and arrange the wires as shown below from left to right. Cut excess until about 1/2 inch is left (important), be sure wires are cut evenly across. Insert into connector (clip down) firmly until wires reach the end, make sure insulation is pushed inside the connector. Crimp with good crimp tool and test.




		Hold connector clip down


	Use This Wiring Order

Pin	Wire Colors on End 1	Wire Colors on End 2
1	White/Orange	White/Green
2	Orange/White	Green/White
3	White/Green	White/Orange
4	Blue/White	Blue/White
5	White/Blue	White/Blue
6	Green/White	Orange/White
7	White/Brown	White/Brown
8	Brown/White	Brown/White


	-What's the difference in a Hub and Switch?

A Hub at Work

A Switch at Work

Here the first computer prints to the printer, but the message is broadcast to all of the computers on the network. A hub works like a telephone party line. Only one computer can talk at a time.

Now the first computer and printer make a private connection during printing, while the 4th computer transfers a file to the 5th computer over another connection. A switch works more like our modern phone system. Computers can talk with each other on private connections so that multiple conversations can be carried on at the same time.

Shared Ethernet Hub

Switched Ethernet Hub

Total network bandwidth is limited to the speed of the hub, i.e. A 10Base-T hub provides 10Mb bandwidth max, no matter how many ports.

Total network bandwidth is determined by the number of ports on the switch. i.e. an 8 port 100Mb switch can support up to 800Mb/s bandwidth.

Supports half duplex communications limiting the connection to the speed of the port, i.e. 10Mb port provides a 10Mb link.

Switches that support full duplex communications offer the ability to double the speed of each link, i.e. from 100Mb to 200Mb.

Hop count rules limit the number of hubs that can be interconnected between two computers.

Allows users to greatly expand networks; there are no limits to the number of switches that can be interconnected between two computers.

Less expensive per port.

Price/performance is worth the slightly higher price.

-What is a Netmask?

Explanation

-What is a Firewall?

A firewall is hardware/software that is located "in front of" your site network, between your network and the Internet, between your network and your regional network, etc. It provides customizable filtering of network traffic, allowing you to restrict access to certain types of network traffic, or to certain TCP/IP ports. It can be used, for example, to block FTP access to your network, or to restrict certain IP addresses or domains from having certain kinds of access to your network.