Selection of Straight-through & Crossover ethernet cable

• Ethernet and Fast ethernet UTP cables use only 2 pairs of wires, one for each direction.
• one pair of wire is used to transmit & the second pair is used to receive.
• Usually PC NICs, Routers & wireless access point (Ethernet interface) use pins 1, 2 to transmit data  and pins 3,6  to receive.
• But switches and hubs use pins 3,6 to transmit data & receives through pins 1,2.
• If like devices need to be connected with each other, you should use crossover cable.

            Where crossover cables are used?

              To connect
             1) A PC to Router directly.
             2)  A PC to Wireless access point (Ethernet Interface).
             3) A Router to wireless access point (Ethernet interface).
             4) A switch to hub.

             Where straight-through cables are used?

                To connect
              1) A PC to switch.
              2) A PC to hub.
              3) A Router to switch
              4) A Router to hub.
              5) A wireless access point (Ethernet interface) to switch.
              6) A wireless access point (Ethernet interface) to hub.

How to create VLANs?
What is NAT in Networking?
What is Router on a stick?
Syslog Severity Levels – Explained.
Why spanning Tree protocol is used?
VLAN Trunking Protocols – 802.1q & ISL.
How a MAC address is universally unique?
What is Syslog – System Message logging?
Media Access Methods – CSMA/CD, CSMA/CA, Token passing & Polling, Explained?