Domain 4 - Communications And Network Security (OSI Model)

Question 1

TCP layer that encompasses the OSI layers: Application (7), Presentation (6), and Session (5).

Answer 1

Application Layer 4 - TCP Model

Question 2

TCP layer where the connection between users is maintained. This layer corresponds with the OSI Transport Layer (4).

Answer 2

Transport Layer 3 - TCP Model

Question 3

TCP layer the corresponds directly with OSI Network Layer 3.

Answer 3

Internet Layer 2 - TCP Model

Question 4

TCP layer that corresponds to OSI Data Link Layer 2 and Physical Layer 1.

Answer 4

Network Access Layer 1 - TCP Model

Question 5

Presents data to the Application Layer (7). Contains two sublayers: Common Application Service Element (CASE) and Specific Application Service Element (SASE).

Answer 5

Presentation Layer 6 - OSI Model

Question 6

Provides reliable connection between peer hosts. Creates the session and ends the session when the host is done. It has three modes: Full duplex, half-duplex, and simplex.

Answer 6

Session Layer 5 - OSI Model

Question 7

Creates and provides end-to-end error detection and correction between peer hosts. UDP and TCP are important protocols in this layer.

Answer 7

Transport Layer 4 - OSI Model

Question 8

Provides information and routing between hosts that are not physically connected. Internet Protocol (IP) addresses are included at this layer.

Answer 8

Network Layer 3 - OSI Model

Question 9

Ensures information is error free and prepares the packets that it receives from the network layer to be transmitted as frames on the network. It converts network layer protocols into bits of information for networking technologies such as Ethernet and Token Ring. This layer has two sublayers: LLC and MAC.

Answer 9

Data Link Layer 2 - OSI Model

Question 10

Topologies are define by the physical characteristics of the network media (cables, connectors, modems, and hubs).

Answer 10

Physical Layer 1 - OSI Model

Question 11

Services that are used with end user applications.

Answer 11

Application Layer 7 - OSI Model

Question 12

SMTP

Answer 12

Application Layer 7 - OSI Model

Question 13

Formats the data so that it can be viewed by the user. Encrypts and Decrypts.

Answer 13

Presentation Layer 6 - OSI Model

Question 14

JPG, GIF, HTTPS, SSL, TLS

Answer 14

Presentation Layer 6 - OSI Model

Question 15

Establishes/ends connections between two hosts.

Answer 15

Session Layer 5 - OSI Model

Question 16

NetBIOS, PPTP

Answer 16

Session Layer 5 - OSI Model

Question 17

Responsible for the transport protocol and error handling.

Answer 17

Transport Layer 4 - OSI Model

Question 18

TCP, UDP

Answer 18

Transport Layer 4 - OSI Model

Question 19

Reads the IP address from the packet.

Answer 19

Network Layer 3 - OSI Model

Question 20

Reads the MAC address from the data packet.

Answer 20

Data Link Layer 2 - OSI Model

Question 21

switches

Answer 21

Data Link Layer 2 - OSI Model

Question 22

Sends data on to the physical wire.

Answer 22

Physical Layer 1 - OSI Model

Question 23

Hubs, NICs, Cables

Answer 23

Physical Layer 1 - OSI Model

Question 24

Layer of the TCP/IP model that corresponds to the Transport Layer of the OSI Model.

Answer 24

Host-to-Host

Question 25

The application layer of the TCO/IP model corresponds to which OSI model layer(s)?

Answer 25

Application, Presentation, and Session layers of the OSI model

Question 26

The Internet layer of the TCP/IP model corresponds to which OSI model layer?

Answer 26

Network layer of the OSI model

Question 27

At which layer does the IP, ARP, and ICMP operate in the OSI model?

Answer 27

The Internet Layer.

Question 28

The Network access layer of the TCP/IP model corresponds to which layer(s) of the OSI model?

Answer 28

Data-Link and Physical layers.

Question 29

How many layers does the OSI model have?

Answer 29

Seven

Question 30

How many layers does the TCP/IP model have?

Answer 30

Four

Question 31

Router, Layer 3 Switchers

Answer 31

Network Layer 3 - OSI Model

Question 32

Portal to network-based services such as determining the identity and availability of remote applications. When an application or OS transmits or receives data over a network, it uses the services from this layer. The protocols at this layer are: HTTP, FTP, SMTP, TSL/SSL, and RADIUS.

Answer 32

Application Layer 7 - OSI Model

Question 33

Provides reliable connection between peer hosts. Creates the session and ends the session when the host is done. It has three modes: Full duplex, half-duplex, and simplex.

Answer 33

Session Layer 5 - OSI Model

Question 34

Seven Layers of the OSI Model

Answer 34

7) Application, (6) Presentation, (5) Session, (4) Transport, (3) Network, (2) Data Link, and (1) Physical