@@QUES 020101 XYF Q,124,396,340,336
See if you can decide which option goes in the blank.

The lower two OSI model layers are implemented with  _ .
|
Choose an option to fill the blank.
|
%010hardware
%010software
%010hardware and software
|

|
3
|
Correct.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020102 T/F Q,153,388,274,315
Do you think that the following statement is true or false?

All network devices implement all seven layers of the OSI model.
|
2
|

|
Correct.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020103 SXY Q,114,395,356,364
Which of System A's seven layers do you think the application program communicates with?

|
Choose an option from the list.
|
7
6
5
4
3
2
1
|

|
1
|
Correct.
|
That's not it. The correct option is now highlighted.
|
2
|
Some authers propose that the  application layer is layer 7, however here the application layer is believed to communicate with layer 7.
|
The correct option is now highlighted.

@@QUES 020104 XYF Q,356,416,270,363
See if you can decide which words go in the blank.

The primary concern of layer six in System A is to communicate with  _ .
|
Choose an option to fill the blank.
|
layer seven in System A
layer five in System A
layer six in System B
|

|
3
|
Correct.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020105 XYF Q,143,401,304,336
See if you can decide which word goes in the blank.

Each layer's protocol exchanges information, called protocol data units (PDUs), between  _  layers.
|
Choose an option to fill the blank.
|
%010peer
%010adjacent
|

|
1
|
Correct.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020106 DTF Q,141,393,303,326
Try to decide which option goes in which blank.

The  _  layer is said to be the service user while the  _  layer is the service provider.
|
Choose an option to fill the first blank.
|
Choose an option to fill the second blank.
|
%010lower
%010upper
|
2
|
Correct.
|
In fact, it's the other way around.
|
You've filled the second blank correctly, but not the first.
|
You've filled the first blank correctly, but not the second.
|
The full statement is now shown.

@@QUES 020107 SXY Q,122,410,350,350
What do you think happens with the IP packet when it is passed down from the network layer to the "Host-To-Network Layer" ?
|
Choose an option from the list.
|
It adds its own header to the IP packet
It strips the network layer header from the packet
It passes it directly to the physical layer without modifying it in any way
|

|
1
|
Correct.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 020108 Y/N Q,134,373,326,275
Do you think that a data-link frame can be transmitted across the physical medium?
|
2
|

|
Correct.
|
In fact, the answer is No.
|
The answer is No.

@@QUES 020201 SXY Q,260,454,253,300
At the physical layer, data is transmitted onto the medium in which of the following forms?
|
Choose an option.
|
Frames
Datagrams
Bits
|

|
3
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 020202 MXY Q,120,432,346,400
Try to identify the correct option(s).

Which of the following characteristics do you think is/are specified by the physical layer?

|
Choose one or more items.
|
%010voltage levels
%010routing protocol to be used
%010timing of voltage changes
%010physical data rates
%010network topology
%010physical connectors
|

|
1,3,4,6
|
Correct.
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.
|
The correct options are highlighted.

@@QUES 020203 XYF Q,102,353,383,302
See if you can decide which word goes in the blank.

This layer is responsible for providing reliable transit of data across a  _  link.
|
Choose an option to fill the blank.
|
%010logical
%010physical
|

|
2
|
Correct.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020204 DTF Q,137,328,299,294
Try to decide which option goes in which blank.

Frames consist of  _ , made up of  _ .
|
Choose an option to fill the first blank.
|
Choose an option to fill the second blank.
|
%010bits
%010fields
|
2
|
That's right.
|
In fact, it's the other way around.
|
Incorrect.
|
Incorrect.
|
The full statement is now shown.

@@QUES 020205 T/F Q,134,357,326,326
Do you think that the following statement is true or false?

Upper layer protocols, for example IP at the network layer, cannot operate without regard for the specific type of LAN media.
|
2
|

|
Correct.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020206 T/F Q,371,331,251,311
Do you think that the following statement is true or false?

Two separate active LAN interfaces can have the same MAC address.
|
2
|

|
Correct.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020207 SXY Q,131,341,327,304
Which device(s) on the LAN do you think will process the request?
|
Choose an option.
|
Host Z only
Host Z and any routers on the LAN
All devices on the LAN
|

|
3
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 020208 XYF Q,283,451,341,357
See if you can choose the correct option to fill in the blank.

Host Z responds with its  _  address.
|
Choose an option to fill the blank.
|
%010logical
%010network
LLC
MAC
|

|
4
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020209 SXY Q,248,447,250,300
What do you think router A sends to host Y?
|
Choose an option.
|
Host X's MAC address
The address of the LAN where host X is located
Its own MAC address
|

|
3
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 020301 SXY Q,298,374,327,352
For which layer of the OSI model do you think the network layer provides services?
|
Choose an option.
|
%010the physical layer
%010the data-link layer
%010the transport layer
%010the session layer
%010the presentation layer
%010the application layer
|

|
3
|
That's it.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 020302 XYF Q,252,452,260,360
See if you can choose the correct option to fill in the blank.

These intermediary nodes are normally  _ .
|
Choose an option to fill the blank.
|
%010routers
%010network servers
%010hubs
%010terminators
|

|
1
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020303 MXY Q,101,352,385,322
Try to identify the correct option(s).

Where do you think this information comes from?
|
Choose one or more items.
|
It is configured by the network administrator
It is available in reference books
It is collected through dynamic processes running on the internetwork
|

|
1,3
|
Correct.
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.
|
The correct options are highlighted.

@@QUES 020304 T/F Q,140,390,305,302
Do you think that the following statement is true or false?

All routing algorithms fill routing tables with the same type of information.
|
2
|

|
Correct.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020401 XYF Q,350,449,276,374
See if you can choose the correct option to fill in the blank.

The transport layer provides a data transport service that shields the  _  layers from transport implementation issues such as the reliability of a connection.
|
Choose an option to fill the blank.
|
OSI
%010lower
%010upper
|

|
3
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020402 MXY Q,126,393,333,322
When data is being sent, the source machine includes extra bits with the data. What do you think these extra bits encode?
|
Choose each appropriate item.
|
The message type
The originating application
the protocols used
|

|
1,2,3
|
That's right.
|
Partly right. All options are correct and are are now highlighted.
|
You have not made any correct choices. All options are correct and are are now highlighted.
|
All options are correct and are are now highlighted.

@@QUES 020403 T/F Q,154,358,292,329
Do you think the following statement is true or false?

During a transfer using TCP, the two machines continue to communicate with their protocol software to verify that data is received correctly.
|
1
|

|
That's right.
|
In fact, they do.
|
The statement is true.

@@QUES 020404 Y/N Q,336,345,291,298
If the traffic continues to arrive at this rate do you think that the temporary buffering of data packets in memory will prevent congestion?
|
2
|

|
You're right.
|
In fact, the answer is No.
|
The answer is No.

@@QUES 020405 T/F Q,141,395,301,317
Do you think the following statement is true or false?

Once congestion occurs it is inevitable that data packets will be lost.
|
2
|

|
That's right.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020406 T/F Q,154,357,278,313
Do you think the following statement is true or false?

Acknowledging each data segment will not affect data throughput.
|
2
|

|
That's right.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020407 SXY Q,263,447,364,393
Which of the following statements do you think is true?

|
Choose an option.
|
With a window size of three the sender can transmit two data segments before expecting one acknowledgement
With a window size of three the sender can transmit three data segments and then expect three acknowledgements back
With a window size of three the sender can transmit three data segments before expecting an acknowledgement
|

|
3
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 020408 T/F Q,126,396,340,318
Do you think the following statement is true or false?

Simplex conversations are the most common type of communication on networks.
|
2
|

|
That's right.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020409 Y/N Q,159,384,276,290
Do you think that the presentation layer is concerned with the data structure used by programs?
|
1
|

|
You're right.
|
In fact, it is.
|
The answer is Yes.

@@QUES 020410 T/F Q,169,390,257,318
Do you think the following statement is true or false?

The presentation layer is responsible for data encryption.
|
1
|

|
That's right.
|
In fact, it is.
|
The statement is true.

@@QUES 020411 Y/N Q,130,373,321,265
Do you think the presentation layer provides standards for sound and movies?
|
1
|

|
You're right.
|
In fact, it does.
|
The answer is Yes.

@@QUES 020412 Y/N Q,132,335,321,254
Do you think the application layer provides services to any other OSI layer?
|
2
|

|
You're right.
|
In fact, the answer is No.
|
The answer is No.

@@QUES 020413 T/F Q,158,407,290,327
Do you think the following statement is true or false?

All computer applications entail a communications component.
|
2
|

|
That's right.
|
Actually, they don't.
|
The statement is false.

@@QUES 020414 T/F Q,140,392,304,319
Do you think the following statement is true or false?

All Web servers use the same formats for text, graphics, video, and sound.
|
2
|

|
That's right.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 020101t MXY Q,0,0,350,350
Which of the following statements is/are true?
|
Choose each appropriate item.
|
The upper five layers of the OSI model are generally implemented in hardware.
All network devices adhere to the OSI model.
Layer one of the OSI model is concerned with moving information on and off the physical network medium.
|
3
|
21
|
Correct.
|
7 per correct decision
|
Partly right. The correct option is now highlighted.
|
You have not made any correct choices. The correct option is now highlighted.

@@QUES 020102t XYF Q,0,0,350,350
The primary concern of the transport layer in a system is to communicate with  _ .
|
Choose an option to fill the blank.
|
%010the session layer in the same system
%010the transport layer in other systems
%010the network layer in the same system
|
2
|
15
|
Correct.
|
Incorrect. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020103t XYF Q,0,0,370,350
The layer protocol of each of the seven layers of the OSI model exchanges  _  between peer layers.
|
Choose an option to fill the blank.
|
%010packets
%010protocol data units
%010segments
%010frames
%010bits
|
2
|
20
|
Correct.
|
Incorrect. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 020104t SXY Q,0,0,350,376
As information descends through the seven layers of the OSI model headers and trailers are added to it as appropriate by the layers. What is this process called?
|
Choose an option from the list.
|
Peer-to-peer communication
Service access
Data encapsulation
Transmission
|
3
|
20
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 020201t DTF Q,0,0,326,280
The  ___  sublayer is not limited to a specific media access  ___  protocol.
|
Choose an option to fill the first blank.
|
Choose an option to fill the second blank.
|
LLC
MAC
|
1
|
Correct.
|
10
|
Incorrect. It's the other way around.
|
0
|
Incorrect.
|
0
|
Incorrect.
|
0
|
The full statement is now shown.

@@QUES 020202t MXY Q,0,0,350,350
Which of the following statements about MAC addresses is/are true?
|
Choose each appropriate item.
|
Several active devices on a LAN can have the same MAC address
The MAC address is unique for each LAN interface
On most LAN interface cards the MAC address is burned into ROM
|
2,3
|
21
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 020203t SXY Q,0,0,330,324
Which six hexadecimal digits of the MAC address are administered by the vendor?
|
Choose an option from the list.
|
The first six digits
The middle six digits
The last six digits
|
3
|
15
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 020204t MXY Q,0,0,350,350
Which of the following statements is/are true?
|
Choose one or more items.
|
The vendor code part of the MAC address is administered by the vendor.
The MAC address is 48-bits long.
The MAC address is unique for each active LAN interface.
|
2,3
|
21
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 020205t FIB Q,0,0,358,235
Before a data-link frame is exchanged with a device on the same LAN, the sending device needs to have a  ___  address it can use as a destination address.
|
Type the missing abbreviation.
|
20
|
%008MAC, mac, Mac
|
That's right.
|

|
Yes, but the word used here is "MAC".
|

|

|

|

|

|
Incorrect. The missing word is "MAC".
|
The full statement is now shown.

@@QUES 020301t SXY Q,0,0,374,350
Which of the following statements is true?
|
Choose an option from the list.
|
The network layer provides services for the data-link layer.
The network layer is the domain of routing.
The network layer sends electrical pulses over the physical medium.
|
2
|
15
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 020302t DTF Q,0,0,295,296
Routing  _  initialize and maintain routing  _ .
|
Choose an option to fill the first blank.
|
Choose an option to fill the second blank.
|
%010tables
%010algorithms
|
2
|
Correct.
|
10
|
Incorrect. It's the other way around.
|
0
|
Incorrect.
|
0
|
Incorrect.
|
0
|
The full statement is now shown.

@@QUES 020303t XYF Q,0,0,350,306
When a router receives an incoming packet, it checks the packet's  _  address and looks up its routing table.
|
Choose an option to fill the blank.
|
%010source
%010destination
|
2
|
10
|
Correct.
|
Incorrect. The correct option is now highlighted.
|
The full statement is now shown.


@@QUES 020401t SXY Q,0,0,326,350
Which of the following layers of the OSI model is concerned with windowing?
|
Choose an option.
|
The transport layer
The session layer
The presentation layer
The application layer
|
1
|
20
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 020402t SXY Q,0,0,336,350
When datagrams arrive too quickly for a device to process, what does the device do?
|
Choose an option.
|
It stores the datagrams temporarily in memory
It ignores some of the datagrams
It stops processing the datagrams
|
1
|
15
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 020403t SXY Q,0,0,350,350
With which of the following types of session layer dialog can conversations operate in both directions, but only in one direction at a time?
|
Choose an option.
|
Simplex
Half-duplex
Full-duplex
|
2
|
15
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 020404t MXY Q,0,0,350,350
For which of the following is the presentation layer responsible?
|
Choose each appropriate item.
|
Data transfer syntax
Windowing
Data formatting
Dialog management
|
1,3
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 020405t Y/N Q,0,0,287,293
Can the application layer provide services to application programs outside the scope of the OSI model?
|
1
|
10
|
Correct.
|
Incorrect. The answer is Yes.
