Refer to the exhibit.
The junior network support staff provided the diagram as a recommended configuration for the
first phase of a four-phase network expansion project. The entire network expansion will have
over 1000 users on 14 network segments and has been allocated this IP address space.
192.168.1.1 through 192.168.5.255
192.168.100.1 through 192.168.100.255
What are three problems with this design? (Choose three.)
A.
The AREA 1 IP address space is inadequate for the number of users.
B.
The AREA 3 IP address space is inadequate for the number of users.
C.
AREA 2 could use a mask of /25 to conserve IP address space.
D.
The network address space that is provided requires a single network-wide mask.
E.
The router-to-router connection is wasting address space.
F.
The broadcast domain in AREA 1 is too large for IP to function.
Explanation:
The given IP addresses of areas 1 and 3 along with network masks of 24 cannot accommodate
500 users so are inadequate, while the area 2 is having over capacity so its network mask can
be reduced to 25 to accommodate the only 60 users it has.
Hi, I am quite new here. I only have one question why would the router to router connection waste address? Albeit, it is understandable but still confused as to why E is a correct answer.
Because of the /26 subnet mask, it’s using 64 addresses for only the two routers. With a /30 mask it’d only use 4 addresses.
As Brendan mentioned /26 = 255.255.255.192 which gives you 64 IPs, 62 valid hosts. You only need 2 for each router interfaces, so it’s a waist of 60 IP addresses.