Download Addressing

IP Addressing and Routing
1
Objectives
1. Addressing and routing overview
2. Classful IP addressing
3. Classless IP addressing
(subnetting)
4. IP routing
2
1. Addressing & Routing
Overview
3
Network Layer:
Path Determination
4
Network Layer:
Path Determination
Which Path?
• Network layer functions to find the best path
through the internetwork
5
Communicate Path
5
2
4
6
9
8
10
1
3
11
7
• Addresses represent the path of media
connections (wires)
6
Addressing: Network and Host
Network
Host
1
1
2
3
2
1
3
1
2.1
1.2
1.3
1.1
3.1
• Network address—Path part used for routing
• Host address—Specific port or device on the network
7
TCP/IP Network Addressing
32 bits
8,16, or 24 bits from IANA
Varies with subnet mask
Network
Host
Ethernet
8
Router Interface Addressing
E1=10.2.5.3
10.2.0.0
10.1.0.0
E2=10.3.15.14
E0=10.1.23.7
10.3.0.0
Destination
Network
Router
Port
Router
Address
10.1.0.0
E0
10.1.23.7
10.2.0.0
E1
10.2.5.3
10.3.0.0
E2
10.3.15.14
• Network portion of
address used to make
path selections
9
Router Interface Addressing
E1=10.2.5.3
10.2.0.0
10.1.0.0
E2=10.3.15.14
E0=10.1.23.7
10.3.0.0
Destination
Network
10.1.0.0
Router
Port
E0
Router
Address
10.1.23.7
10.2.0.0
E1
10.2.5.3
10.3.0.0
E2
10.3.15.14
• Network portion of
address used to make
path selections
• Node portion of address
refers to router port
10
Router Interface Addressing
E1=10.2.5.3
10.2.0.0
10.1.0.0
E2=10.3.15.14
E0=10.1.23.7
10.3.0.0
Destination
Network
10.1.0.0
Router
Port
E0
Router
Address
• Network portion of
address used to make
path selections
10.1.23.7
10.2.0.0
E1
10.2.5.3
• Node portion of address
refers to router port
10.3.0.0
E2
10.3.15.14
• On router each interface
has different IP address
11
Routing Tables In Routers
10.1.0.0
10.2.0.0
A
S1
S0
Routing Table
S0
10.3.0.0
B
S1
Routing Table
10.4.0.0
S0
C
S1
Routing Table
10.1.0.0
S1
0
10.2.0.0
S0
0
10.3.0.0
S0
0
10.2.0.0
S0
0
10.3.0.0
S1
0
10.4.0.0
S1
0
10.3.0.0
S0
1
10.4.0.0
S1
1
10.2.0.0
S0
1
10.4.0.0
S0
2
10.1.0.0
S0
1
10.1.0.0
S0
2
• Router uses the best path to destination
12
Analogy
Network
Street name
Host
Building number
Router
Crossing
Routing table
Direction signs
Packets
Taxi with passenger
Destination IP address
Street address
“Please take me to Oxford Street 23!”
13
2. Classful IP Addressing
14
TCP/IP Addresses
UNIX Host
UNIX Host
Internet
TCP/IP
Company A
Company B
• Unique addressing allows seamless
communication between end stations
Path choice is based on location
Location is represented by an address
15
Introduction to TCP/IP
Addresses
UNIX Host
UNIX Host
Company A
Company B
• Unique addressing allows seamless
communication between end stations
• Path choice is based on location
Location is represented by an address
16
Introduction to TCP/IP
Addresses
UNIX Host
Company A
UNIX Host
Company B
• Unique addressing allows seamless
communication between end stations
• Path choice is based on location
• Location is represented by a network address
17
IP Addressing
32 Bits
Network
Host
18
IP Addressing
32 Bits
Network
8 Bits
Host
8 Bits
8 Bits
8 Bits
19
Dotted Decimal Notation
32 Bits
Network
8 Bits
172
Host
8 Bits
.
16
8 Bits
8 Bits
. 122 . 204
20
Dotted Deciaml Notation
21
Binary Conversion Table
22
IP Address Classes
• Class A:
N
H
H
H
• Class B:
N
N
H
H
• Class C:
N
N
N
H
• Class D: for multicast
• Class E: for research
N = Network number
H = Host number
23
IP Address Bit Patterns
# Bits
Class A:
1
7
0
network #
24
host #
24
IP Address Bit Patterns
# Bits
Class A:
1
7
0
network #
# Bits 1
Class B:
1
1
0
24
14
network #
host #
16
host #
25
IP Address Bit Patterns
# Bits
Class A:
1
7
0
network #
# Bits 1
Class B:
1
24
host #
14
16
1
0
# Bits 1
1
1
21
8
1
0
network #
host #
Class C:
1
network #
host #
26
IP Address Classes
27
Number of Networks and Hosts
28
Recognizing Classes in IP
Addresses (First Octet Rule)
High Order
Bits
Octet in
Decimal
Address
Class
0
1 – 126
A
10
128 – 191
B
110
192 – 223
C
29
Written 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
30
Written Exercise: IP Address
Classes
Address
10.2.1.1
Class
Network
Host
A
128.63.2.100
201.222.5.64
192.6.141.2
130.113.64.16
256.241.201.10
31
Written Exercise: IP Address
Classes
Address
10.2.1.1
Class
A
Network
Host
10.0.0.0
128.63.2.100
201.222.5.64
192.6.141.2
130.113.64.16
256.241.201.10
32
Written Exercise: IP Address
Classes
Address
10.2.1.1
Class
A
Network
10.0.0.0
Host
0.2.1.1
128.63.2.100
201.222.5.64
192.6.141.2
130.113.64.16
256.241.201.10
33
Written Exercise: IP Address
Classes
Address
Class
10.2.1.1
A
128.63.2.100
B
Network
10.0.0.0
Host
0.2.1.1
201.222.5.64
192.6.141.2
130.113.64.16
256.241.201.10
34
Written Exercise: IP Address
Classes
Address
Class
Network
10.2.1.1
A
10.0.0.0
128.63.2.100
B
128.63.0.0
Host
0.2.1.1
201.222.5.64
192.6.141.2
130.113.64.16
256.241.201.10
35
Written Exercise: 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
192.6.141.2
130.113.64.16
256.241.201.10
36
Written Exercise: 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
192.6.141.2
130.113.64.16
256.241.201.10
37
Written Exercise: 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
192.6.141.2
130.113.64.16
256.241.201.10
38
Written Exercise: 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
130.113.64.16
256.241.201.10
39
Written Exercise: 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
130.113.64.16
256.241.201.10
40
Written Exercise: 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
130.113.64.16
256.241.201.10
41
Written Exercise: 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
256.241.201.10
42
Written Exercise: 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
256.241.201.10
43
Written Exercise: 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
256.241.201.10
44
Written Exercise: 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
45
Written Exercise: 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
46
10
. 1 . 1 . 1
Network
Host
Host Addresses
172.16.2.1
10.1.1.1
E0
E1
172.16.3.10
10.250.8.11
172.16.12.12
10.180.30.118
IP: 172.16.2.1
172.16
Network
.
12 . 12
Host
IP: 10.6.24.2
Routing Table
Network
Interface
172.16.0.0
E0
10.0.0.0
E1
47
3. Classless IP Addressing
(subnetting)
48
Addressing without Subnets
172.16.0.0
• Network 172.16.0.0
49
Addressing with Subnets
172.16.3.0
172.16.4.0
172.16.1.0
172.16.2.0
• Network 172.16.0.0
50
Subnet Addressing
172.16.2.200
172.16.3.5
E0
E1
172.16.2.2
172.16.3.100
172.16.2.160
172.16.3.150
Routing Table
Subnet
Interface
172.16.0.0
E0
172.16.0.0
E1
51
Subnet Addressing
172.16.2.200
172.16.3.5
E0
E1
172.16.2.2
172.16.3.100
172.16.2.160
172.16.3.150
IP: 172.16.2.1
172.16 .
Network
2
.
160
Subnet Host
IP: 172.16.3.1
Routing Table
Subnet
Interface
172.16.0.0
E0
172.16.0.0
E1
52
Subnet Addressing
172.16.2.200
172.16.3.5
E0
E1
172.16.2.2
172.16.3.100
172.16.2.160
172.16.3.150
IP: 172.16.2.1
172.16 .
Network
2
.
160
Subnet Host
IP: 172.16.3.1
New Routing Table
Subnet
Interface
172.16.2.0 /24
E0
172.16.3.0 /24
E1
53
Subnet Mask
IP
Address
172
16
2
160
54
Subnet Mask
IP
Address
172
16
2
Network
Default
Subnet
Mask /16
255
160
Host
255
0
0
55
Subnet Mask
IP
Address
172
16
2
Network
Default
Subnet
Mask /16
255
Host
255
Network
8-bit
Subnet
Mask /24
255
160
255
0
0
Subnet
Host
255
0
Use host bits, starting at the
high order bit position
56
CIDR Notation for Subnets
CIDR notation
CIDR – Classless Inter Domain Routing
57
Subnet Mask without Subnets
Network
Host
172.16.2.160
10101100
00010000
00000010
10100000
255.255.0.0
11111111
11111111
00000000
00000000
10101100
00010000
00000000
00000000
172
16
0
0
• CIDR notation /16
58
Subnet Mask with Subnets
Network
Subnet
Host
172.16.2.160
10101100
00010000
00000010
10100000
255.255.255.0
11111111
11111111
11111111
00000000
10101100
00010000
00000010
00000000
172
16
2
0
• CIDR notation /24
59
IP Subnetting Example
189.168. 12. 55
255.255.255.224
--------------189.168. 12. 32
1011 1101 . 1010 1000 . 0000 1100 . 0011 0111
1111 1111 . 1111 1111 . 1111 1111 . 1110 0000
--------------------------------------------1011 1101 . 1010 1000 . 0000 1100 . 0010 0000
• CIDR notation /27
60
Written Exercise: Subnet Masks
Address
Subnet Mask
172.16.2.10
255.255.255.0
10.6.24.20
255.255.0.0
10.30.36.12
255.255.255.0
Subnet
Host
61
Written Exercise: Subnet Masks
Address
Subnet Mask
Subnet
172.16.2.10/24
255.255.255.0
172.16.2.0
10.6.24.20
255.255.0.0
10.30.36.12
255.255.255.0
Host
62
Written Exercise: Subnet Masks
Address
Subnet Mask
Subnet
Host
172.16.2.10/24
255.255.255.0
172.16.2.0
0.0.0.10
10.6.24.20
255.255.0.0
10.30.36.12
255.255.255.0
63
Written Exercise: Subnet Masks
Address
Subnet Mask
Subnet
Host
172.16.2.10/24
255.255.255.0
172.16.2.0
0.0.0.10
10.6.24.20/16
255.255.0.0
10.6.0.0
10.30.36.12
255.255.255.0
64
Written Exercise: Subnet Masks
Address
Subnet Mask
Subnet
Host
172.16.2.10/24
255.255.255.0
172.16.2.0
0.0.0.10
10.6.24.20/16
255.255.0.0
10.6.0.0
0.0.24.20
10.30.36.12
255.255.255.0
65
Written Exercise: Subnet Masks
Address
Subnet Mask
Subnet
Host
172.16.2.10/24
255.255.255.0
172.16.2.0
0.0.0.10
10.6.24.20/16
255.255.0.0
10.6.0.0
0.0.24.20
10.30.36.12/24
255.255.255.0
10.30.36.0
66
Written Exercise: Subnet Masks
Address
Subnet Mask
Subnet
Host
172.16.2.10/24
255.255.255.0
172.16.2.0
0.0.0.10
10.6.24.20/16
255.255.0.0
10.6.0.0
0.0.24.20
10.30.36.12/24
255.255.255.0
10.30.36.0
0.0.0.12
67
Subnet Planning
20 subnets
5 hosts per subnet
Class C address:
201.222.5.0
Other
subnets
68
Class C Subnet Planning
Example
IP Host Address: 201.222.5.121
Subnet Mask: 255.255.255.248
Network
Subnet Host
201.222.5.121: 11001001
11011110
00000101 01111
001
255.255.255.248: 11111111
11111111
11111111
11111
000
Subnet: 11001001
11011110
00000101 01111
000
201
•
•
•
•
222
5
120
Subnet Address = 201.222.5.120
Host Addresses = 201.222.5.121–201.222.5.126
Broadcast Address = 201.222.5.127
Five Bits of Subnetting
• CIDR notation /29
69
Broadcast Addresses
172.16.3.0
172.16.4.0
172.16.1.0
172.16.2.0
70
Broadcast Addresses
172.16.3.0
172.16.4.0
172.16.1.0
172.16.2.0
255.255.255.255
(Local network broadcast)
X
71
Broadcast Addresses
172.16.3.0
172.16.4.0
172.16.1.0
172.16.2.0
172.16.3.255
(Directed broadcast)
255.255.255.255
(Local network broadcast)
X
72
Special IP Address Forms
73
Subnet Planning
20 subnets
5 hosts per subnet
Class C address:
201.222.5.0
201.222.5.16
Other
subnets
201.222.5.32
201.222.5.48
• CIDR notation /29
74
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
201.222.10.60
255.255.255.248
15.16.193.6
255.255.248.0
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
CIDR
Subnet
Broadcast
75
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
201.222.10.60
255.255.255.248
15.16.193.6
255.255.248.0
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
CIDR
Subnet
Broadcast
/29
76
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
201.222.10.60
255.255.255.248
15.16.193.6
255.255.248.0
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
CIDR
/29
Subnet
Broadcast
201.222.10.56
77
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
201.222.10.60
255.255.255.248
15.16.193.6
255.255.248.0
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
CIDR
/29
Subnet
Broadcast
201.222.10.56 201.222.10.63
78
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
201.222.10.60
255.255.255.248
/29
15.16.193.6
255.255.248.0
/21
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
Subnet
Broadcast
201.222.10.56 201.222.10.63
79
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
80
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
128.16.32.13
255.255.255.252
153.50.6.27
255.255.255.128
15.16.199.255
81
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
128.16.32.13
255.255.255.252
/30
153.50.6.27
255.255.255.128
15.16.199.255
82
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
128.16.32.13
255.255.255.252
/30
128.16.32.12
153.50.6.27
255.255.255.128
15.16.199.255
83
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
15.16.199.255
128.16.32.13
255.255.255.252
/30
128.16.32.12
128.16.32.15
153.50.6.27
255.255.255.128
84
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
15.16.199.255
128.16.32.13
255.255.255.252
/30
128.16.32.12
128.16.32.15
153.50.6.27
255.255.255.128
/25
85
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
15.16.199.255
128.16.32.13
255.255.255.252
/30
128.16.32.12
128.16.32.15
153.50.6.27
255.255.255.128
/25
153.50.6.0
86
Written Exercise: Broadcast
Addresses
Address
Subnet Mask
CIDR
Subnet
Broadcast
201.222.10.60
255.255.255.248
/29
201.222.10.56 201.222.10.63
15.16.193.6
255.255.248.0
/21
15.16.192.0
15.16.199.255
128.16.32.13
255.255.255.252
/30
128.16.32.12
128.16.32.15
153.50.6.27
255.255.255.128
/25
153.50.6.0
153.50.6.127
87
4. IP Routing
88
IP Routing Learns Destinations
• Static routes
• Default routes
• Dynamic routing
89
Static Route Configuration
Router (config)#
ip route network [ mask ] { address | interface } [ distance ]
• Defines a path to an IP destination
network or subnet
90
Dynamic Routing Operations
Network
Routing Protocol
Routing
Table
Routing Protocol
A router passes
routing information
to its neighbors
Routing
Table
• Routing protocol maintains and distributes routing information
91
IP Routing Table
Network
10.1.2.0
Internet
Network 10.8.4.0
Network
10.1.1.0
S0
E0
To0
Routing Table
Network Interface/NextHop
10.1.2.4
Network
10.1.3.0
Default route
Token
Ring
Distance
10.1.2.0/24
E0, Directly Connected
0
10.1.1.0/24
0
10.8.4.0/24
To0,Directly Connected
S0, Directly Connected
10.1.3.0/24
10.1.2.4, NextHop
0
1
0.0.0.0/0
S0, NextHop
12
92
Static Routing Configuration
Router(config)#
interface E0
ip address 10.1.2.1 255.255.255.0
interface S0
ip address 10.8.4.2 255.255.255.0
interface To0
ip address 10.1.1.3 255.255.255.0
ip route 10.1.3.0 255.255.255.0 10.1.2.4 1
ip route 0.0.0.0 0.0.0.0 S0 12
93
Routing Table in Windows 98
C:\WINDOWS>route print
Active Routes:
Network Address
Netmask
Gateway Address
Interface
Metric
0.0.0.0
0.0.0.0
159.148.108.254
159.148.108.217
1
0.0.0.0
0.0.0.0
193.219.192.226
193.219.192.227
1
127.0.0.0
255.0.0.0
127.0.0.1
127.0.0.1
1
159.148.108.128
255.255.255.128
159.148.108.217
159.148.108.217
1
159.148.108.217
255.255.255.255
127.0.0.1
127.0.0.1
1
159.148.255.255
255.255.255.255
159.148.108.217
159.148.108.217
1
193.219.192.224
255.255.255.248
193.219.192.227
193.219.192.227
1
193.219.192.227
255.255.255.255
127.0.0.1
127.0.0.1
1
224.0.0.0
224.0.0.0
193.219.192.227
193.219.192.227
1
224.0.0.0
224.0.0.0
159.148.108.217
159.148.108.217
1
255.255.255.255
255.255.255.255
193.219.192.227
0.0.0.0
1
C:\WINDOWS>
94
Address Resolution Protocol
I need the
Ethernet address
of 176.16.3.2.
172.16.3.1
172.16.3.2
IP: 172.16.3.2 = ???
• Map IP
Ethernet
95
Address Resolution Protocol
I heard that broadcast.
The message is for me.
Here is my Ethernet
address.
I need the
Ethernet address
of 176.16.3.2.
172.16.3.1
172.16.3.2
IP: 172.16.3.2 = ???
• Map IP
Ethernet
96
Address Resolution Protocol
I heard that broadcast.
The message is for me.
Here is my Ethernet
address.
I need the
Ethernet address
of 176.16.3.2.
172.16.3.1
172.16.3.2
IP: 172.16.3.2 = ???
IP: 172.16.3.2
Ethernet: 0800.0020.1111
• Map IP
Ethernet
97
Address Resolution Protocol
I heard that broadcast.
The message is for me.
Here is my Ethernet
address.
I need the
Ethernet address
of 176.16.3.2.
172.16.3.1
172.16.3.2
IP: 172.16.3.2 = ???
IP: 172.16.3.2
Ethernet: 0800.0020.1111
• Map IP
Ethernet
98
ARP Table Example
99
Ethernet ARP Message Format
100
Excersise / Assignment #1
101
IP Addressing Example
Internet
Routing Table
Network
NextHop
Distance
192.168.16.16/28 DirectlyConnected
192.168.16.32/28 Directly Connected
192.168.16.0/28 192.168.16.33
0.0.0.0/0
192.168.16.33
0
0
1
12
102
IP Addressing & Routing
Assignment #1
Internet
A
C
B



Divide class C address 201.7.8.0
in three subnets with
subnet mask 255.255.255.224
Assign IP addresses to all interfaces
Design routing tables for A, B, C
103