EIGRP

Enhanced Interior Gateway Routing Protocol (EIGRP) is an enhanced version of IGRP. IGRP is Cisco's Interior Gateway Routing Protocol used in TCP/IP and OSI internets. It is regarded as an interior gateway protocol (IGP) but has also been used extensively as an exterior gateway protocol for inter-domain routing.

Twisted Pair cable

Unshielded Twisted Pair cables help reduce interference.This happens because of the twisting of the wires in the cable and the magnetic field around the adjacent pairs of wire.

http://networkeze.yolasite.com/

Crossover cable

Static Route

hostname R2
!
enable password ww
!
!
!
!
!
ip subnet-zero
no ip finger
no ip domain-lookup
!
!
!
interface Ethernet0
description Local LAN
ip address 172.31.10.2 255.255.255.0
!
interface Serial0
description Primary Link to R1
ip address 10.10.10.2 255.255.255.252
clockrate 56000
!
interface Serial1
description Backup Link to R1
ip address 192.168.20.2 255.255.255.252
!
interface TokenRing0
no ip address
shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.10.10.1

!--- This is the primary default route.
ip route 0.0.0.0 0.0.0.0 192.168.20.1 250

!--- The floating default route to be used if the T1 fails.
no ip http server
!
!
line con 0
exec-timeout 0 0
transport input none
line aux 0
line vty 0 4
password ww
login

OSI Model

Application
Presentation
Session
Transport
Network
Data Link
Physical

TCP/IP Model

OSI MODEL

Subnet Calculator

My favorite Subnet Calculator
http://www.subnet-calculator.com/