What is meant by same layer interaction

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:

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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:

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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.

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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

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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.

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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:

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Q:

What port number is used for FTP control?

A) 20	B) 21
C) 22	D) 25

Answer & Explanation Answer: B) 21

Explanation:

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Q:

What port number is used for DHCP?

A) 67	B) 68
C) 69	D) Both A and B

A) That a packet is forwarded to a different host that resides in the same layer of the Cisco three layer hierarchical model.	B) That an interaction occurs within a single layer of a networking model and that no other layers or devices take any part in the interaction.
C) An interaction that progresses up or down only one level of a networking model.	D) That two computers use a protocol defined at the same layer of a networking model to communicate with each other.

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