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- CCNA – Basic Questions 2
Here you will find answers to Basic Questions – Part 2
Question 1
What are some of the advantages of using a router to segment the network? (Choose two)
A. Filtering can occur based on Layer 3 information.
B. Broadcasts are eliminated.
C. Routers generally cost less than switches.
D. Broadcasts are not forwarded across the router.
E. Adding a router to the network decreases latency.
Answer: A D
Question 2
Which of the following statements describe the network shown in the graphic? (Choose
two)
A. There are two broadcast domains in the network.
B. There are four broadcast domains in the network.
C. There are six broadcast domains in the network.
D. There are four collision domains in the network.
E. There are five collision domains in the network.
F. There are seven collision domains in the network.
Answer: A F
Explanation
Only router can break up broadcast domains so in the exhibit there are 2 broadcast
domains: from e0 interface to the left is a broadcast domain and from e1 interface to the
right is another broadcast domain -> A is correct.
- Both router and switch can break up collision domains so there is only 1 collision domain
on the left of the router (because hub doesn’t break up collision domain) and there are 6
collision domains on the right of the router (1 collision domain from e1 interface to the
switch + 5 collision domains for 5 PCs in Production) -> F is correct.
Question 3
Refer to the exhibit. The two connected ports on the switch are not turning orange or
green. What would be the most effective steps to troubleshoot this physical layer
problem? (Choose three)
A. Ensure that the Ethernet encapsulations match on the interconnected router and switch
ports.
B. Ensure that cables A and B are straight-through cables.
C. Ensure cable A is plugged into a trunk port.
D. Ensure the switch has power.
E. Reboot all of the devices.
F. Reseat all cables.
Answer: B D F
Explanation
The ports on the switch are not up indicating it is a layer 1 (physical) problem so we
should check cable type, power and how they are plugged in.
Question 4
For what two purposes does the Ethernet protocol use physical addresses? (Choose two)
A. to uniquely identify devices at Layer 2
B. to allow communication with devices on a different network
C. to differentiate a Layer 2 frame from a Layer 3 packet
D. to establish a priority system to determine which device gets to transmit first
E. to allow communication between different devices on the same network
F. to allow detection of a remote device when its physical address is unknown
- Answer: A E
Explanation
Physical addresses or MAC addresses are used to identify devices at layer 2 -> A is
correct.
MAC addresses are only used to communicate on the same network. To communicate on
different network we have to use Layer 3 addresses (IP addresses) -> B is not correct; E
is correct.
Layer 2 frame and Layer 3 packet can be recognized via headers. Layer 3 packet also
contains physical address -> C is not correct.
On Ethernet, each frame has the same priority to transmit by default -> D is not correct.
All devices need a physical address to identify itself. If not, they can not communicate ->
F is not correct.
Question 5
Refer to the exhibit. Two buildings on the San Jose campus of a small company must be
connected to use Ethernet with a bandwidth of at least 100 Mbps. The company is
concerned about possible problems from voltage potential difference between the two
buildings. Which media type should be used for the connection?
A. UTP cable
B. STP cable
C. Coaxial cable
D. Fiber optic cable
Answer: D
Explanation
Because the company has problem about voltage potential difference between the two
buildings so they should connect via fiber optic cable which uses light pulses to transmit
information instead of using electronic pulses.
Question 6
Which command can be used from a PC to verify the connectivity between host that
connect through path?
- A. tracert address
B. ping address
C. arp address
D. traceroute address
Answer: A
Explanation
To check the connectivity between a host and a destination (through some networks) we
can use both “tracert” and “ping” commands. But the difference between these 2
commands is the “tracert” command can display a list of near-side router interfaces in the
path between the source and the destination. Therefore the best answer in this case is A –
tracert address.
Note: “traceroute” command has the same function of the “tracert” command but it is
used on Cisco routers only, not on a PC.
Question 7
Refer to the exhibit. A network engineer is troubleshooting an internet connectivity
problem on the computer. What causing the problem?
A. wrong DNS server
B. wrong default gateway
C. incorrect IP address
D. incorrect subnet mask
Answer: C
Explanation
The IP address of the PC (192.168.11.2/24) is not on the same network with its gateway
192.168.1.1 -> C is correct.
- Question 8
How many broadcast domains are shown in the graphic assuming only the default vlan is
configured on the switches?
A. one
B. six
C. twelve
D. two
Answer: A
Explanation
Only router can break up broadcast domains but in this exhibit no router is used so there
is only 1 broadcast domain.
For your information, there are 7 collision domains in this exhibit (6 collision domains
between hubs & switches + 1 collision between the two switches).
Question 9
Refer to the exhibit.
PC> tracert 10.16.176.23
Tracing route to 10.16.176.23 over a maximum of 30 hops
1 31 ms 31 ms 32ms 172.16.182.1
2 62 ms 62 ms 62 ms 192.1681.6
3 93 ms 92 ms 34 ms 192.168.1.10
4 125 ms 110ms 125ms 10.16.176.23
Trace complete.
Host A has tested connectivity to a remote network. What is the default gateway for host
A?
A. 172.16.182.1
B. 192.168.1.1
C. 10.16.176.1
D. 192.168.1.6
- Answer: A
Explanation
It will list all the routers (from nearest to farthest) it passes through until it reaches its
destination so the first hop is its nearest IP. If we ping from a PC, it is also the default
gateway for that PC -> A is correct.
Question 10
What functions do routers perform in a network? (Choose two)
A. packet switching
B. access layer security
C. path selection
D. VLAN membership assignment
E. bridging between LAN segments
F. microsegmentation of broadcast domains
Answer: A C
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