Sawaal
1
Q:

You are the network administrator and are given the tasks to plan for the future expansion of the network. You decide to subnet the current network of 172.15.0.0. What will be the subnet mask be if every subnet has to allocate 500 hosts.

A) 255.255.0.0 B) 255.0.0.0
C) 255.255.240.0 D) 255.255.254.0

Answer:   D) 255.255.254.0



Explanation:

Explanation: The requirement of having to allocate 500 hosts on each subnet can be achieved by the following: 2^9 = 512. So deducting the broadcast and network address we have 510 possible hosts on each subnet. We used 9 bits to allocate the hosts, this leaves us 7 bits for possible subnets. Those 7 bits in binary is 1111 1110 or 254 in decimal.

Subject: CCENT
Related Questions
Q:

Which process ensures that the components of the computer are connected properly ?

A) Booting B) Saving
C) Processing D) Editing
 
Answer & Explanation Answer: A) Booting

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: CCENT
Job Role: Analyst

9 1750
Q:

which IOS command enables access to high-level commands?

A) su root B) admin 0
C) enable D) init
 
Answer & Explanation Answer: C) enable

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: CCENT

1 2868
Q:

The exhibit below shows the output of a show ip interface brief on a Cisco router.

r1#show ip interface brief

Serial0/0 does not respond to ping requests. What step would you take to resolve the problem?

A) Change ip address on Serial0/0 B) Enable the interface Serial0/0
C) Check the physical connection in Serial 0/0 D) The interface looks fine in status up, problem must be somewhere else
 
Answer & Explanation Answer: C) Check the physical connection in Serial 0/0

Explanation:

In order for an interface to work properly and respond to ping requests, both Status and Protocol must be up.

Report Error

View Answer Report Error Discuss

Filed Under: CCENT

1 3588
Q:

After the devices have been configured as shown, it is determined that the branch office in Chicago doesn't have connectivity to the Internet through the headquarters in Dallas. How would you fix the problem?

A) Change ip address on the WAN side of the Chicago router B) Change ip address on the LAN side of the Chicago router
C) Change ip address on the LAN side of the Dallas router D) Change ip address on the WAN side of the Dallas router
 
Answer & Explanation Answer: A) Change ip address on the WAN side of the Chicago router

Explanation:

192.168.20.3/30 is not a valid ip address, should be 192.168.20.1/30

Report Error

View Answer Report Error Discuss

Filed Under: CCENT

3 3881
Q:

The network with ip address 192.168.100.0/27 is to be used on a router. If ip subnet-zero is configured, which statement describe the resulting number of available subnets and hosts?

A) 7 usable subnets, each with 32 host addresses B) 8 usable subnets, each with 30 host addresses
C) 8 usable subnets, each with 27 host addresses D) 7 usable subnets, each with 24 host addresses
 
Answer & Explanation Answer: B) 8 usable subnets, each with 30 host addresses

Explanation:

Because subnet zero is configured and we have a class C address (192.168.100.0) then the network portion will have 3 bits so 8 subnets will be available. The rest of the bits, 5, represent the available hosts, so 2^5=32, but only 30 are available, 0 ad 31 are network and broadcast respectively.

Report Error

View Answer Report Error Discuss

Filed Under: CCENT

6 6946
Q:

What does a firewall?

A) Examines packets and decides which ones should be allowed to pass from one network to another. B) Maintains a table which maps the IP addresses of two network so that packets can be redirected between the networks.
C) Compares packets to virus signatures so that packets which are know to be dangerous can be identified and stopped. D) Prevents viruses from moving any further through a network
 
Answer & Explanation Answer: A) Examines packets and decides which ones should be allowed to pass from one network to another.

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: CCENT

2 3376
Q:

What port number is used for FTP control?

A) 20 B) 21
C) 22 D) 25
 
Answer & Explanation Answer: B) 21

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: CCENT

1 2373
Q:

What port number is used for DHCP?

A) 67 B) 68
C) 69 D) Both A and B
 
Answer & Explanation Answer: D) Both A and B

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: CCENT

2 2226