Ôn tập về ERouting Chapter 6 - CCNA Exploration (Version 4.0)

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Q1 :A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)

• 255.255.255.252 for QA
• 255.255.255.224 for Sales
• 255.255.255.240 for QA
• 255.255.255.248 for QA
• 255.255.255.0 for Sales

Q2 :In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?

• 3
• 4
• 12
• 36
• 84
• 180

Q3: A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?

• 192.168.0.0 – 192.168.32.0/24
• 192.168.0.0 – 192.168.47.0/24
• 192.168.32.0 – 192.168.47.0/24
• 192.168.32.0 – 192.168.48.0/24
• 192.168.32.0 – 192.168.63.0/24

[Rookie0212]

Ôn tập về ERouting Chapter 6 - CCNA Exploration (Version 4.0)

Q4 :
Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?

• 192.168.0.0/23
• 192.168.0.0/22
• 192.168.0.0/21
• 192.168.0.0/20

Q5: An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?

• 192.1.1.16/26
• 192.1.1.96/28
• 192.1.1.160/28
• 192.1.1.196/27
• 192.1.1.224/28
• 192.1.1.240/28

Q6 :
Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in each subnet. Which IP address would be usable for a host on one of the LANs in this network?

• 192.168.1.5/30
• 192.168.2.17/28
• 192.168.2.63/27
• 192.168.2.130/25

[Rookie0212]

Ôn tập về ERouting Chapter 6 - CCNA Exploration (Version 4.0)

Q 7:
Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?

• 6
• 14
• 29
• 34
• 40
• 62

Q8:
A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?

• /31
• /30
• /29
• /28
• /27
• /26

Q9 :Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?

• none
• 8
• 16
• 24

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