Chapter 9 & 10 TCP/IP

TCP/IP Model Application Transport Internet Internet Access

Application Layer Protocols - 7 FTP – 21 Telnet – 23 SMTP – 25 DNS – 53 TFTP – 69 SNMP – 161

Transport Layer Protocols – 4 TCP – What are its functions? UDP – How does it differ from TCP?

Network Layer Protocols – 3 IP RIP, IGRP, OSPF ICMP PING

Network Access – 1&2 MAC Ethernet IEEE 802.X FDDI Token Ring Topology Logical Physical

ARP Address Resolution Protocol Given an IP Address, what is the MAC? ARP tables kept by Routers From DOS prompt ARP –a At router Show ARP To rebuild ARP table, Clear ARP To start use PING

Testing Connectivity PING Trace Trace * * *

TCP/IP Subnetting Create a group of subnets from one large network address. Subnets have an address – all host bits are zeros. Subnets have a broadcast address – all host bits are ones. Useable address ranges are the bits in-between What would be the flooded broadcast address for ? What would be the directed broadcast address of address SN Mask ?

Host Tables IP host command Router(config)#ip host ip address(es) Example: Ip host ATC

Name Server Configuration Supplies DNS server addresses to routers Ip name-server Example: Ip name-server

Turn Off DNS DNS turned on by default If turned off, restart by- Router(config)#ip domain-lookup Turn off with- Router(config)#no ip domain-lookup To see host table: Router#show hosts

Connectivity Testing PING – ICMP Echo request Trace – uses host name Telnet (most complete)