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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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Q:

What is the specific term for the unwanted signal interference from adjacent pairs in the cable?

A) EMI	B) RFI
C) Crosstalk	D) Attenuation

Answer & Explanation Answer: C) Crosstalk

Explanation:

The term for the unwanted signal interference from adjacent pairs in the cable is crosstalk

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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

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