Computers And Technology College


Answer the following questions:

Question 4
............ in the data link layer separates a message from one source to a destination, or from other messages to other destinations, by adding a sender address and a destination address.

Group of answer choices
Transforming
Framing
Separating
Messaging


Question 5
Functions of data link control includes
Group of answer choices
framing
flow and error control
addressing
All of above


Question 6
In which of the following modes of the CLI could you configure the duplex setting for interface Fast Ethernet 0/5?
Group of answer choices
User mode
Enable mode
Global configuration mode
VLAN mode
Interface configuration mode


Question 7
It is how the receiver detects the start and end of a frame.
Group of answer choices
Error control
Flow control
Framing
None of the above


Question 8
Which of the following describes a way to disable IEEE standard autonegotiation on a 0/00 port on a Cisco switch?
Group of answer choices
Configure the negotiate disable interface subcommand
Configure the no negotiate interface subcommand
Configure the speed 00 interface subcommand
Configure the duplex half interface subcommand
Configure the duplex full interface subcommand
Configure the speed 00 and duplex full interface subcommands


Question 9
______ substitutes eight consecutive zeros with 000VB0VB.
Group of answer choices
B4B8
HDB3
B8ZS
none of the above


Question 0
In _________ transmission, we send bits one after another without start or stop bits or gaps. It is the responsibility of the receiver to group the bits.
Group of answer choices
synchronous
asynchronous
isochronous
none of the above


Question
In _______ transmission, bits are transmitted over a single wire, one at a time.
Group of answer choices
asynchronous serial
synchronous serial
parallel
(a) and (b)


Question 2
Digital data refers to information that is
Group of answer choices
Continuous
Discrete
Bits
Bytes


Question 3
Two common scrambling techniques are ________.
Group of answer choices
NRZ and RZ
AMI and NRZ
B8ZS and HDB3
Manchester and differential Manchester


Question 4
________ is the process of converting digital data to a digital signal.
Group of answer choices
Block coding
Line coding
Scrambling
None of the above


Question 5
A switch receives a frame with a destination MAC address that is currently not in the MAC table. What action does the switch perform?
Group of answer choices
It drops the frame. .
It floods the frame out of all active ports, except the origination port.
It sends out an ARP request looking for the MAC address.
It returns the frame to the sender


Question 6
The _______ layer changes bits into electromagnetic signals.
Group of answer choices
Physical
Data link
Transport
None of the above


Question 7
Serial transmission occurs in
Group of answer choices
way
2 ways
3 ways
4 ways


Question 8
What type of switch memory is used to store the configuration used by the switch when it is up and working?
Group of answer choices
RAM
ROM
Flash
NVRAM


Question 9
In what modes can you type the command show mac address-table and expect to get a response with MAC table entries? (Select Two)
Group of answer choices
User mode
Enable mode
Global configuration mode
Interface configuration mode


Question 20
Which of the following are true when comparing TCP/IP to the OSI Reference Model? (Select Two)
Group of answer choices
The TCP/IP model has seven layers while the OSI model has only four layers.
The TCP/IP model has four or five layers while the OSI model has seven layers.
The TCP/IP Application layer maps to the Application, Session, and Presentation layers of the OSI Reference Model.
he TCP/IP Application layer is virtually identical to the OSI Application layer.



Answers

Answer 1

Answer:

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Related Questions

Assume that the execution time for a program is directly proportional to instruction access time. The access to an instruction in the cache is 10 times faster than access to an instruction in the main memory. If an instruction is not found in the cache, i.e., cache miss, it is fetched from the main memory to the cache and then fetched from the cache to be executed. Assume that a requested instruction will cause cache miss has a probability of 0.08. Let the speedup factor is defined as the ratio of program execution time without the cache to program execution time with the cache.
a. Calculate the speedup factor to execute such a program.
b. using this assumption, assuming that the cache is 20 times faster than the main memory.

Answers

Answer:

a. 5.81

B. 7.93

Explanation:

A.

X is the time it takes to load instructions from cache

10X = time to execute program

0.08 = probability of cache instructions

1-0.08 = 0.92(92% instructions are going to be loaded from cache).

Tc = time to execute with cache

Tc = 0.92X+0.08x10X

= 0.92X+0.8X

= 1.72X

Speed factor = tm/tc

= 10X/1.72X

= 5.81

B.

If cache is 20 times faster

Tm = 20X

Tc = 0.92X + 0.08 x 20X

= 0.92X + 1.6X

= 2.52X

Speed factor = 20X/2.52X

= 7.93

What is an antivirus?

Answers

An antivirus is a software designed to detect and destroy computer viruses.
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