Operations

Here you will find answers to operation questions in ICND 1 exam

Question 1:

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 198.168.100.255

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.

Answer: A C E

Question 2:

Refer to the exhibit. A technician is testing connection problems in the internetwork. What is the problem indicated by the output from HostA?

A – The routing on Router2 is not functioning properly.
B – An access list is applied to an interface of Router3.
C – The Fa0/24 interface of Switch1 is down.
D – The gateway address of HostA is incorrect or not configured.

Answer: D

Explanation:

When trying to ping the IP 192.168.3.254,you received the replies from that IP. It means that you can reach the Fa0/0 interface of Router1. But notice that the IP of host A (192.168.3.1/24) and the IP of the Fa0/0 interface of Router 1 (192.168.3.254/24) are on the same network. So you don’t need a gateway address configured on HostA. Therefore you can’t conclude the gateway address of HostA was configured correctly.

Lately, you tried to use the tracert command to reach another network (192.168.4.7). In this case, a gateway address was required for reaching the network of hostB. But the result told that “Destination host unreachable” – means that Host A can not find a route to Host B -> The gateway address of Host A was incorrect (something other than 192.168.3.254) or not configured is a possibility.

A and B are incorrect because if there is a mis-configuration on Router 2 or Router 3 (while Router 1 is configurated correctly), you will see at least one successful line when using tracert command likes the bold line below:

PC>tracert 192.168.4.7

Tracing route to 192.168.4.7 over a maximum of 30 hops:

1 62 ms 62 ms 46 ms 192.168.3.254
2 * * * Request timed out.

C is incorrect because we can ping Router 1 -> port Fa0/24 on Switch 1 was turned on and running correctly.

Question 3:

Refer to the exhibit. The internetwork is using subnets of the address 192.168.1.0 with a subset mask of 255.255.255.224. The routing protocol in use is RIP version 1. Which address could be assigned to the FastEthernet interface on RouterA?

A – 192.168.1.31
B – 192.168.1.64
C – 192.168.1.127
D – 192.168.1.190
E – 192.168.1.192

Answer: D

Explanation:

255.255.255.224 = 1111 1111.1111 1111.1111 1111.1110 0000 (binary form)

Increment: 32

First subnetwork: 192.168.1.0 -> 192.168.1.31 (A is incorrect because 192.168.1.31 is a broadcast address)
Second subnetwork: 192.168.1.32 -> 192.168.1.63
Third subnetwork: 192.168.1.64 -> 192.168.1.95 (B is incorrect because 192.168.1.64 is a network address)
Fourth subnetwork: 192.168.1.96 -> 192.168.1.127 (C is incorrect because 192.168.1.127 is a broadcast address)
Fifth subnetwork: 192.168.1.128 -> 192.168.1.159
Sixth subnetwork: 192.168.1.160 -> 192.168.1.191 (D is correct because 192.168.1.190 is the last assignable host address of this subnetwork)
Seventh subnetwork: 192.168.1.192 -> 192.168.1.224 (E is incorrect because 192.168.1.192 is a network address)

Question 4:

Refer to the exhibit. For security reasons, information about RTA, including platform and IP addresses, should not be accessible from the Internet. This information should, however, be accessible to devices on the internal networks of RTA. Which command or series of commands will accomplish these objectives?

A – RTA(config)#no cdp run
B – RTA(config)#no cdp enable
C – RTA(config)#interface s0/0
RTA(config-if)#no cdp run
D – RTA(config)#interface s0/0
RTA(config-if)#no cdp enable

Answer: D

Question 5:

Refer to the exhibit, PC1 pings PC2. What three things will CORE router do with the data that is received from PC1? (Choose three)

A – The data frames will be forwarded out interface FastEthernet0/1 of CORE router.
B – The data frames will be forwarded out interface FastEthernet1/0 of CORE router.
C – CORE router will replace the destination IP address of the packets with the IP address of PC2.
D – CORE router will place the MAC address of PC2 in the destination MAC address of the frames.
E – CORE router will put the IP address of the forwarding FastEthernet interface in the place of the source IP address in the packets.
F – CORE router will put the MAC address of the forwarding FastEthernet interface in the place of the source MAC address.

Answer: B D F