Networking: DHCP and NNTP Protocols

NETWORKING

Table of Contents
Part 1...........................................................................................................................................................2
Table 1.........................................................................................................................................................2
Table 2.........................................................................................................................................................2
Analysis of the address Usage.....................................................................................................................3
Part 3...........................................................................................................................................................3
DHCP (Dynamic host Configuration Protocol)..........................................................................................3
Description of the protocol.................................................................................................................3
Purpose of the protocol......................................................................................................................3
Transport layer protocols...................................................................................................................4
Transport layer ports..........................................................................................................................4
How it works.......................................................................................................................................4
NNTP application protocol (Network News Transfer protocol)...................................................................5
Description and Purpose.....................................................................................................................5
Transport layer ports..........................................................................................................................5
How it works.......................................................................................................................................6
References...................................................................................................................................................7
1

Part 1
Table 1
Subnet Network address Mask donated Number of hosts
including pc
Number of
unused IP
address
A 192.168.128.0 255.255.192.0 256 32,766
B 192.160.0.0 255.240.0.0 254 1,048,574
C 192.168.128.0 255.255.224.0 254 8,190
D 192.168.136.0 255.255.248.0 254 2,046
E 192.168.140.0 255.255.254.0 254 510
Table 2
Device Interface IP address Mask dotted in
decimal
Default gateway
R1
Fa0/0 192.168.143.1 255.255.255.0 N/A
Fa0/1 192.168.140.1 255.255.255.0 N/A
S0/0 192.168.148.2 255.255.255.0 N/A
R2 Fa0/0 192.168.142.1 255.255.255.0 N/A
Fa0/1 192.168.140.2 255.255.255.0 N/A
S0/0 192.168.148.1 255.255.255.0 N/A
1st PC subnet A NIC 192.168.128.1 255.255.192.0. 192.168..0.1
Last pc subnet A NIC 192.168.255.254 255.255.192.0 192.168.0.1
1st PC subnet B NIC 192.160.0.1 255.240.0.0 192.160.0.1
Last pc subnet B NIC 192.175.255.254 255.240.0.0 192.160.0.1
1st PC subnet C NIC 192.168.128.1 255.255.224.0 192.168.128.1
Last pc subnet C NIC 192.168.128.254 255.255.224.0 192.168.128.1
1st PC subnet D NIC 192.168.136.1 255.255.248.0 192.168.136.1
1st PC subnet D NIC 192.168.136.254 255.255.248.0 192.168.138.1
DNS SERVER NIC 192.168.142.5 255.255.255.255 192.168.142.1
EAGLE SERVER NIC 192.168.142.8 255.255.255.255 168.168.142.1
2