OSI Model

Question 1

Flow control can be found at which layer of the OSI?

Answer 1

The Transport layer is responsible for flow control via the TCP/IP protocols of TCP and UDP.

Question 2

Which layer of the OSI is responsible for dialogue control of applications?

Answer 2

The Session layer is responsible for offsetting up the dialogue between two hosts.

Question 3

the layer for logical addressing of network nodes

Answer 3

.The Network layer is responsible for

Question 4

the layer for framing of data and the physical addressing of local nodes.

Answer 4

The Data Link layer is responsible forthe framing of data and the physical addressing of local nodes.

Question 5

The layer responsible for setting up the dialogue between two hosts.

Answer 5

The Session layer is responsible for

Question 6

Which layer is compression and decompression, as well as encryption and decryption.

Answer 6

Presentation layer is responsible for

Question 7

The logical link control (LLC) sublayer is responsible for

Answer 7

managing access to Network layer protocols

Question 8

The media access control (MAC) sublayer is responsible for

Answer 8

physical addressing and framing data for the transmission media.

Question 9

Layer that is responsible for framing data and contains the LLC and MAC sublayers.

Answer 9

he Data Link layer is responsible for

Question 10

The IEEE 802.2 working group defines the

Answer 10

Logic Link Control (LLC) sublayer of the Data Link layer.

Question 11

The IEEE 802.3 and 802.11 working groups define the

Answer 11

Media Access Control (MAC) sublayer of the Data Link layer.

Question 12

The IEEE 802.15 working group defines

Answer 12

wireless personal area networks (WPANs).

Question 13

The concept of transmitting multiple segments before the receiving host acknowledges the data is

Answer 13

windowing.

Question 14

Sequencing is done with each segment so they can be combined back together at the

Answer 14

Transport layer.

Question 15

The layer for flow control and creating virtual circuits

Answer 15

The Transport layer

Question 16

The layer responsible for routing network packets

Answer 16

Network

Question 17

The layer that is responsible for framing bits

Answer 17

Data Link Layer

Question 18

the IEEE standard of 802.3 specifies the

Answer 18

carrier sense multiple access/collision detection (CSMA/CD) contention method.

Question 19

The IEEE standard for 802.5 details the

Answer 19

disbanded Token Ring specification

Question 20

Which Layer uses port numbers

Answer 20

Transport Layer

Question 21

Datagrams are routed across which layer?

Answer 21

Network Layer

Question 22

Which layer applies a header and footer to create an Ethernet frame?

Answer 22

Data Link

Question 23

Which layer applies a header to create an IP datagram

Answer 23

Network

Question 24

Which layer applies a TCP or UDP header to create a segment or datagram

Answer 24

Transport

Question 25

Which layer provides an entry point for applications to access the protocol stack?

Answer 25

Application

Question 26

Which is the only layer that adds a header and a footer to data?

Answer 26

Data Link

Question 27

Internet Message Access Protocol (IMAP) operates at which layer?

Answer 27

Application

Question 28

Which of the OSI model layers is responsible for syntax translation and compression or encryption?

Answer 28

Presentation Layer

Question 29

Hypertext Transfer Protocol (HTTP) and Simple Network Management Protocol (SNMP) operate at the

Answer 29

Application layer.

Question 30

Internet Control Message Protocol (ICMP) and Internet Group Management Protocol (IGMP) both operate at the

Answer 30

Network layer.

Question 31

User Datagram Protocol (UDP) operates at the

Answer 31

Transport Layer

Question 32

Internet Control Message Protocol (ICMP) operates at the

Answer 32

Network layer by sending operational and error messages

Question 33

Address Resolution Protocol (ARP) does not encapsulate upper layer protocol data, but it is a

Answer 33

Data link layer protocol.

Question 34

the following devices enables two computers to communicate when they are using different protocols at each layer

Answer 34

Gateway

Question 35

IP address filtering operates at whch layer

Answer 35

Network

Question 36

Hubs operate at which layer

Answer 36

Physical

Question 37

Switches operate at which layer

Answer 37

Data Link

Question 38

Proxy servers operate at which layer of the OSI reference model

Answer 38

A proxy server is an Application layer service because it receives Internet service requests from client computers, reads the Application layer protocol data in each request, and then generates its own request for the same service and transmits it to the Internet server the client specifies.