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utumn 2004-2005 Oct 21, 2004
CS573: Network Protocols and Standards 1
Oct 21, 2004 CS573: Network Protocols and Standards 1
IP: Addressing, ARP, Routing
Network Protocols and Standards Autumn 2004-2005
Oct 21, 2004 CS573: Network Protocols and Standards 2
IPv4IP Datagram FormatIPv4 Addressing
ARP and RARPIP Routing BasicsSubnetting and
SupernettingICMPNetwork Address Translation (NAT)Dynamic
Addressing
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CS573: Network Protocols and Standards 2
Oct 21, 2004 CS573: Network Protocols and Standards 3
Internet Addresses (IP Addresses)Defined when IP was
standardized in 1981IP addresses are 32-bit long and consist
of:
a network address part network identifiera host address part
host number within thatnetwork
IP addresses are grouped into classes (A,B,C)depending on the
size of the network identifier and the host part of the address
A fourth class (Class D) was defined later(1988) for Multicast
addresses
Oct 21, 2004 CS573: Network Protocols and Standards 4
Internet Address Classes
NETWORK
0 8 16 24 32 bits
NETWORK
NETWORK
IP MULTICAST ADDRESSES (28 BITS)
RESERVED FOR EXPERIMENTS
0
10
110
1110
11110
Class A
Class B
Class C
Class D
Class E
HOST (24 BITS)
HOST (16 BITS)
HOST (8 BITS)
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Oct 21, 2004 CS573: Network Protocols and Standards 5
Internet Address ClassesClass A
126 networks (0 and 127 reserved) Assigned to very large size
networks where 65K < numberof hosts < 16M
Class B16384 networks
Assigned to Intermediate size networks where 256
