QUESTION:

(a) Below is a capture of an Ethernet II frame which contains an IPv4 packet and a TCP segment. Give the source MAC address for the frame in hexadecimal; the source IP address, the total length in bytes and the header checksum for the packet in decimal; the destination port number in decimal for the segment and hence deduce the application layer protocol this segment is destined to.

00 24 2b ec 4a cc 00 19 4b 3b f2 10 08 00 45 00
01 de 56 08 00 00 38 06 38 9e 4a 7d e6 44 c0 a8
01 0a 00 50 2c 5e 28 b6 ca f6 e1 5e 81 e8 50 18
1c 0e a1 9d 00 00

(b) Given a following information by your ISP about your newly acquired 256 kbps Frame Relay Over IP connection: Public IP: 202.123.21.0 /26

You are required to design a network layout which constitutes of a LAN having 3 subnets (with Internet connectivity) for each department in your company.

• Two of the 3 subnets are assumed to have each around 50 hosts, inclusive of a file server, an internal web server and a network printer.
• The 3rd subnet is to be connected using a wireless Access Point and all the hosts (around 20) on that subnet are assumed to be Wi-Fi ready.
• Finally, all 3 subnets should make use of dynamic addressing.
• Draw the network layout and giving maximum information about:
• IP, Subnet Mask & Gateway addresses of all devices, servers, printers, and 1 host from each subnet.
• Type and hierarchy of hardware devices, transmission media and network topology you might adopt, with justifications, where necessary.