2. Why a logical network diagram is needed? A certain network has two firewalls that form
a DMZ and four NIDS. An e-mail server, DNS and web server are located inside the
DMZ. A domain controller, database server, file server and three hosts are located in the
internal network. Design the logical diagram for this network clearly identifying and
labelling each component.
Word Count: 200
3. Suppose you are given the task of designing networks for a company with 5
departments having around 25 computers in each department. You are required to write
the calculation procedure of subnet mask, block size, first and last network IP address,
broadcast IP address and block of valid host IP addresses. If the company adds a new
large department with 70 computers, what changes would you suggest in terms of
subnet mask and your network design. Discuss the procedure of supernetting scheme
and make a summarisation of the network 172.1.4.8/25, network 172.1.4.128/25 and
network 172.1.5.9/24.
Word Count: 800
4. Discuss the two main types of the routing protocols and analyse their features critically.
Comment which of these types would be your preferred choice as the network
administrator in the scenario given in Question 3 explaining reasons.
Word Count: 500