Introduction to Cisco Router Configuration
Chapter 10 - TCP/IP Overview
Objectives
Upon completion of this chapter, you will be able to:
- Describe how the TCP/IP implementation relates to the OSI
reference model.
- Identify the functions of the TCP/IP transport-layer
protocols.
- Identify the functions of the TCP/IP network-layer
protocols.
- Identify the functions performed by ICMP.
Summary
- The TCP/IP protocol stack has the following components:
- Protocols to support file transfer, e-mail,
remote login, and other applications.
- Reliable and "unreliable" transports.
- Connectionless datagram delivery at the network
layer.
- ICMP provides control and message functions at the
network layer.
Excercise
Problem 1
Objective: Describe how the TCP/IP implementation
relates to the OSI reference model.
Write the answer to each question.
- Which TCP/IP reference model conceptual layer is closely
related to the OSI model transport layer? _______
- Which TCP/IP reference model conceptual layer performs
functions similar to Layers 5, 6, and 7 of the OSI
reference model? _______
- Which TCP/IP reference model conceptual layer is closely
related to the OSI model network layer? _______
- Which TCP/IP reference model conceptual layer performs
functions similar to Layers 1 and 2 of the OSI reference
model? _______
Problem 2
Objective: Identify the functions of the TCP/IP
transport-layer protocols.
Objective: Identify the functions of the TCP/IP network-layer
protocols.
Objective: Identify the functions performed by ICMP.
For each statement in the table below, write the name of the
protocol being described. Place a mark in the T column if the
protocol is a transport-layer protocol. Place a mark in the N
column if the protocol is a network-layer protocol.
| Protocol Name |
T |
N |
Statement |
| |
|
|
Maps a known IP address to a MAC sublayer address. |
| |
|
|
Includes Layer 4 protocol ID in header. |
| |
|
|
Used to send Destination Unreachable messages. |
| |
|
|
Breaks messages into datagrams. |
| |
|
|
Provides no software checking. |
| |
|
|
Uses sequence numbers. |
| |
|
|
Relies on application-layer reliability. |
| |
|
|
Uses table entry to respond to address requests. |
| |
|
|
Provides bes-effort delivery. |
| |
|
|
Reassembles datagrams into messages. |
| |
|
|
Handshakes with receiving device. |
| |
|
|
Used to send error and control messages. |
| |
|
|
Consults subnet mask to determine whether nodes are
on the same subnet. |
| |
|
|
Provides connectionless transmission. |
| |
|
|
Sends acknowledgments. |
| |
|
|
Uses no windowing. |
Answers
Problem 1
- Transport layer.
- Application layer.
- Internet layer.
- Network interface layer.
Problem 2
| Protocol Name |
T |
N |
Statement |
| ARP |
|
x |
Maps a known IP address to a MAC sublayer address. |
| IP |
|
x |
Includes Layer 4 protocol ID in header. |
| ICMP |
|
x |
Used to send Destination Unreachable messages. |
| TCP |
x |
|
Breaks messages into datagrams. |
| UDP |
x |
|
Provides no software checking. |
| TCP |
x |
|
Uses sequence numbers. |
| UDP |
x |
|
Relies on application-layer reliability. |
| RARP |
|
x |
Uses table entry to respond to address requests. |
| IP |
|
x |
Provides bes-effort delivery. |
| TCP |
x |
|
Reassembles datagrams into messages. |
| TCP |
x |
|
Handshakes with receiving device. |
| ICMP |
|
x |
Used to send error and control messages. |
| ARP |
|
x |
Consults subnet mask to determine whether nodes are
on the same subnet. |
| UDP |
x |
|
Provides connectionless transmission. |
| TCP |
x |
|
Sends acknowledgments. |
| UDP |
x |
|
Uses no windowing. |
Chapter 11 - IP Address Configuration
Objectives
Upon completion of this chapter, you will be able to perform
the following tasks:
- Describe the different classes of IP addresses.
- Configure IP addresses.
- Verify IP addresses.
Summary
- IP addresses are specified in 32-bit dotted decimal
format.
- Router interfaces can be configured with an IP address.
- ping and trace commands can be used to
verify IP address configuration.
Exercise
IP Address Classes
| Address |
Class |
Network |
Host |
| 10.2.1.1 |
|
|
|
| 128.63.2.100 |
|
|
|
| 201.222.5.64 |
|
|
|
| 192.6.141.2 |
|
|
|
| 130.113.64.16 |
|
|
|
| 256.241.201.10 |
|
|
|
Objective: Describe the
different classes of IP addresses.
Write the address class (A, B, or C) the network, and the host
numbers for each IP address listed in the table.
Subnet Masks
| Address |
Subnet Mask |
Class |
Subnet |
| 127.16.2.10 |
255.255.255.0 |
|
|
| 10.6.24.20 |
255.255.0.0 |
|
|
| 172.30.36.12 |
255.255.255.0 |
|
|
Objective: Extract network
information. Prepare to configure IP addresses.
Use the IP address to perform a logical AND with the subnet mask
to determine the subnet number. Write the address class and
subnet number in the table.
Broadcast Addresses
| Address |
Subnet Mask |
Class |
Subnet |
Broadcast |
| 201.222.10.60/29 |
255.255.255.248 |
|
|
|
| 15.16.193.6/21 |
255.255.248.0 |
|
|
|
| 128.16.32.13/30 |
255.255.255.252 |
|
|
|
| 153.50.6.27/25 |
255.255.255.128 |
|
|
|
Objective: Configure IP
addresses.
Write the address class, subnet number, and the broadcast address
for the subnet for each of the IP addresses and subnet masks in
the table.
Answer
IP Address Classes
| Address |
Class |
Network |
Host |
| 10.2.1.1 |
A |
10.0.0.0 |
0.2.1.1 |
| 128.63.2.100 |
B |
128.63.0.0 |
0.0.2.100 |
| 201.222.5.64 |
C |
201.222.5.0 |
0.0.0.64 |
| 192.6.141.2 |
C |
192.6.141.0 |
0.0.0.2 |
| 130.113.64.16 |
B |
130.113.0.0 |
0.0.64.16 |
| 256.241.201.10 |
Nonexistent |
|
|
Subnet Masks
| Address |
Subnet Mask |
Class |
Subnet |
| 127.16.2.10 |
255.255.255.0 |
B |
172.16.2.0 |
| 10.6.24.20 |
255.255.0.0 |
A |
10.6.0.0 |
| 172.30.36.12 |
255.255.255.0 |
B |
172.30.36.0 |
Broadcast Addresses
| Address |
Subnet Mask |
Class |
Subnet |
Broadcast |
| 201.222.10.60/29 |
255.255.255.248 |
C |
201.222.10.56 |
201.222.10.63 |
| 15.16.193.6/21 |
255.255.248.0 |
A |
15.16.192.0 |
15.16.199.255 |
| 128.16.32.13/30 |
255.255.255.252 |
B |
128.16.32.12 |
128.16.32.15 |
| 153.50.6.27/25 |
255.255.255.128 |
A |
153.50.6.0 |
153.50.6.127 |
Chapter 12 - IP Routing Configuration
Objectives
Upon completion of this chapter, you will be able to perform
the following tasks:
- Perform the initial configuration of your router and
enable IP.
- Add the RIP routing protocol to your configuration.
- Add the IGRP routing protocol to your configuration.
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