chapter 2: CCNA1 ppsx

CCNA 1 V4.0 – Test module – Chapter 2

(Copyright MẠNH HẠO NHIÊN)

(Màu đỏ là đáp án đúng)

1. Which statements correctly identify the role of intermediary devices in the

network? (Choose three.)

1. determine pathways for data*

2. initiate data communications

3. retime and retransmit data signals*

4. originate the flow of data

5. manage data flows*

6. final termination point for data flow

2. Select the statements that are correct concerning network protocols. (Choose

three.)

1. define the structure of layer specific PDU’s*

2. dictate how to accomplish layer functions

3. outline the functions necessary for communications between layers*

4. limit the need for hardware compatibility

5. require layer dependent encapsulations*

6. eliminate standardization among vendors

3. What are two functions of encapsulation? (Choose two.)

1. tracks delay between end devices

2. enables consistent network paths for communication

3. allows modification of the original data before transmission

4. identifies pieces of data as part of the same communication*

5. ensures that data pieces can be directed to the correct receiving end

device*

4. What is a primary function of the trailer information added by the data link

layer encapsulation?

1. supports error detection*

2. ensures ordered arrival of data

3. provides delivery to correct destination

4. identifies the devices on the local network

5. assists intermediary devices with processing and path selection

5. Which two layers of the OSI model have the same functions as the TCP/IP

model Network Access Layer? (Choose two.)

1. Network

2. Transport

3. Physical*

4. Data Link*

5. Session

6. What is a PDU?

1. corruption of a frame during transmission

2. data reassembled at the destination

3. retransmitted packets due to lost communication

4. a layer specific encapsulation*