Draw the network layout, Computer Network Security

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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.

0015   563a   4c79   0013   024a   8897   0800   4500   0030
daf3    4000   8006   4673   c0a8   0142   480e   cf68    08af
0050   9347   9790   0000   0000   7002   4000   35e7  0000
0204   05b4   0101   0402

b) Given a following information by your ISP about your newly acquired 256 kbps Frame Relay Over IP connection: Public IP: 202.123.21.121 /28

• You are required to design a network layout which constitutes of a LAN having 4 subnets (with Internet connectivity) for each department in your company.
• 3 of the 4 subnets are assumed to have each around 50 hosts, inclusive of a file server, an internal web server and a network printer.
• One of the 4 subnets is to be connected using a wireless Access Point and all the hosts (around 19) on that subnet are assumed to be Wi-Fi ready.
• Finally, all 4 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.


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