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Q:

Which class of IP address provides a maximum of only 254 host addresses per network ID?

A) Class A B) Class B
C) Class C D) Class D
 
Answer & Explanation Answer: C) Class C

Explanation:

Class C network address has only 8 bits for defining hosts : 28-2 = 256 - 2 = 254

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Filed Under: CCNA
Job Role: Analyst , IT Trainer , Project Manager

Q:

What must happen if a DHCP IP conflict occurs?

A) Proxy ARP will fix the issue B) The client uses a gratuitous ARP to fix the issue
C) The administrator must fix the conflict by hand at the DHCP server D) The DHCP server will reassign new IP addresses to both computers
 
Answer & Explanation Answer: C) The administrator must fix the conflict by hand at the DHCP server

Explanation:

If a DHCP Conflict is detected, either by the server sending a ping and getting response or by a host using a gratuitous ARP (arp'ing for its own IP address and seeing if a host responds), then the server will hold that address and not use it again until it is fixed by an administrator.

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Q:

In the operation of CSMA/CD, which host(s) have priority after the expiration of the backoff algorithm?

A) All hosts have equal priority B) The two hosts that caused the collision will have equal priority
C) The host that sent the jam signal after the collision D) The host with the highest MAC address
 
Answer & Explanation Answer: A) All hosts have equal priority

Explanation:

After the expiration of the backoff algorithm , all hosts have equal priority.

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Q:

When making a HyperTerminal connection, what must the bit rate be set to?

A) 2400bps B) 1200bps
C) 9600bps D) 6400bps
 
Answer & Explanation Answer: C) 9600bps

Explanation:

When making a HyperTerminal connection, the bit rate must be set to 9600bps.

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Q:

Which of the following is part of the IEEE 802.3u standard?

A) 100Base2 B) 10Base5
C) 100Base-TX D) 1000Base-T
 
Answer & Explanation Answer: C) 100Base-TX

Explanation:

IEEE 802.3u is Fast Ethernet at 100Mbps and covers 100Base-TX, 100BaseT4, and 100Base-FX.

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Q:

Which layer ensures the trustworthly transmission of data across a physical link and is primarily concerned with physical addressing, line discipline, network topology, error notification, ordered delivery of frames, and flow control?

Answer

PDUs at the data link layer are called frames and provide physical addressing, plus other options to place packets on the network medium.

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Q:

Which layer is used for reliable communication between end nodes over the network and provides mechanisms for establishing , maintaining , and terminating virtual circuits; transport - fault detection and recovery; and controlling the flow of information?

Answer

The Transport layer uses virtual circuits to create a reliable connection between two hosts.

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Subject: CCNA

Q:

At which layer is routing implemented , enabling connections and path selection between two end systems?

Answer

The Network layer provides routing through an internetwork and logical addressing.

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Subject: CCNA