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Q:

Differentiate types of Ethernet cabling and identify their proper application?

Answer

The three types of cables that can be created from an Ethernet cable are straight-through (to connect a PC's or a router's Ethernet interface to a hub or switch), crossover (to connect hub to hub , hub to switch, switch to switch, or PC to PC), and rolled (for a console conection from a PC to a router or switch).

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Subject: CCNA

Q:

Identify the fields in the Data Link portion of an Ethernet frame?

Answer

The fields in the Data Link portion of a frame include the Preamble, Start Frame Delimiter, Destination MAC address, Source MAC address, Length or Type, Data, and Frame Check Sequence.

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Subject: CCNA

Q:

Convert the following from binary format to hexadecimal

11001010.11110101.10000011.11101011

Answer

$\begin{matrix} Binary & 128& 64& 32& 16 & 8 & 4 & 2 & 1 & Hexadecimal\\ 11001010& 1 & 1& 0 & 0& 1& 0 & 1 & 0 &CA \\ 11110101& 1& 1& 1 & 1 & 0& 1 & 0 & 1 &F5 \\ 10000011& 1 & 0 & 0 & 0 & 0 &0 & 1& 1& 83\\ 11101011& 1& 1& 1& 0& 1& 0& 1& 1 & EB \end{matrix}$

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Q:

Convert the following from binary format to decimal IP address.

11001100.00110011.10101010.01010101

Answer

$\begin{matrix} Binary & 128 & 64 & 32 & 16 & 8 & 4 & 2 & 1 &Decimal \\ 11001100& 1& 1& 0& 0 & 1 & 1 & 0 & 0 & 204\\ 00110011& 0& 0& 1& 1& 0 & 0 &1 & 1 & 51\\ 10101010& 1& 0& 1 & 0 & 1 & 0& 1 & 0& 170\\ 01010101& 0& 1& 0 & 1 & 0 & 1 & 0 & 1 & 85 \end{matrix}$

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Q:

Convert the following from decimal IP address to binary format.

192.168.10.15

Answer

$\begin{matrix} Decimal & 128 & 64 & 32 & 16 & 8 & 4 & 2 & 1 &Binary \\ 192& 1 &1 & 0 & 0 & 0 & 0 & 0 & 0 & 11000000\\ 168& 1 &0 & 1 & 0 & 1 & 0 & 0 & 0 & 10101000\\ 10& 0& 0 &0 & 0 & 1 & 0 & 1 & 0 & 00001010\\ 15& 0 &0 & 0 & 0 & 1 & 1 & 1 & 1 & 00001111 \end{matrix}$

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Subject: CCNA

Q:

Which of the following is correct?

A) Full- duplex Ethernet uses one pair of wires	B) Full- duplex Ethernet uses two pairs of wires
C) Half- duplex Ethernet uses two pairs of wires	D) Full- duplex Ethernet uses three pairs of wires

Answer & Explanation Answer: B) Full- duplex Ethernet uses two pairs of wires

Explanation:

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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:

You have the following binary number :10110111. What are the decimal and hexadecimal equivalents?

A) 69/0x2102	B) 183/B7
C) 173/A6	D) 83/0xC5

Answer & Explanation Answer: B) 183/B7

Explanation:

You must be able to take a binary number and convert it into both decimal and hexadecimal. To convert to decimal, just add up the 1s using their values. The values that are turned on with the binary number of 10110111 are 128+32+16+4+2+1=183. To get the hexadecimal equivalent, you need to break the eight binary digits into nibbles (4 bits), 1011 and 0111. By adding up these values, you get 11 and 7. In hexadecimal, 11 is B, so the answer is 0xB7.

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