A company has changed ISPs for their office and ordered a new 250 Mbps symmetrical Internet
connection. As a result, they have been given a new IP range. The ISP has assigned the company
10.10.150.16 /28. The company gateway router has the following interface configuration facing the
ISP:
Interface A:
IP address: 10.10.150.16
Subnet mask: 255.255.255.240
Default gateway: 10.10.150.32
Speed: 1000 Mbps
Duplex: Auto
State: No Shutdown
None of the workstations at the company are able to access the Internet. Which of the following
are the reasons? (Select TWO).
A.
There is a duplex mismatch between the router and ISP.
B.
The router interface is turned off.
C.
The interface is set to the incorrect speed.
D.
The router is configured with the incorrect subnet mask.
E.
The router interface is configured with the incorrect IP address.
F.
The default gateway is configured incorrectly.
Explanation:
why is the IP address incorrect?
Its the network address for the subnet, so it shouldn’t be assigned to a device.
.16 and .32 are ip addresses used for broadcasts.
/28
2 power of 4 = 16 – 2 [ID/Broadcast] = 14 [hosts]
.16 = Network ID
.17 to .30 = Hosts
.31 = Broadcast
.32 does not even makes part of this range.