quiz osi

by Sasha Shkrebets — last modified Feb 16, 2022 02:59 PM

Quiz 02 Network Reference Model_RU

10/10 points (ungraded)

Single-answer question:

1. The Open System Interconnection Reference Model divides a network into seven layers, from bottom layer to top layer. Which of the following are the layers from bottom layer to top layer?

Physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer correct
Physical layer, data link layer, network layer, session layer, transport layer, presentation layer, and application layer
Physical layer, data link layer, network layer, transport layer, presentation layer, session layer, and application layer
Physical layer, data link layer, transport layer, network layer, session layer, presentation layer, and application layer

2. Which of the following port numbers is used by Telnet?

6
23 correct
17
21

Multiple-answer question:

3. What are the functions of the network layer?

Provide logical addresses for devices on the network.
Establish connections between processes on hosts.
Sends packets from the source host to the destination host.
Forward data packets.
correct

4. Which of the following statements are correct?

Application layer: layer closest to users in the OSI reference model, providing network services for applications.
Transport layer: provides connection-oriented or non-connection-oriented data transfer and error detection before retransmission.
Network layer: Defines logical addresses for routers to determine paths and is responsible for transferring data from the source network to the destination network.
Session layer: establishes, manages, and terminates communication sessions between presentation layer entities.
correct

5. Which of the following flags in the TCP header participate in the TCP three-way handshake?

SYN
URG
ACK
FIN
correct

6. Which of the following are valid MAC addresses?

19-22-01-63-23
68-F7-23-8B-33-A2
00-3C-1G-A1-23-B2
00-00-11-11-11-AA
correct

True or false:

7. A MAC address consists of 12 hexadecimal digits and 48 bits (6 bytes).

True correct
False

8. ARP Reply packets are broadcast so that all hosts can receive them.

True
False correct

9. Common data link layer protocols include Ethernet, PPPoE, and PPP.

True correct
False

10. To disconnect a TCP connection, you only need to disconnect the connection in one direction.

True
False correct