OSI Model

Question 1

What are the 7 layers in the OSI Model in order.

Answer 1

7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical

Question 2

Different _________ work at different levels of the OSI model

Answer 2

protocols

Question 3

_____ is an extremely fast, streamlined protocol that is not connection oriented

Answer 3

IPX

Question 4

IPX is a routable protocol that is located at the_________ layer of the OSI model. Because it is also an unreliable connectionless _________, IPX also applies to layer 4

Answer 4

IPX is a routable protocol that is located at the network layer of the OSI model. Because it is also an unreliable connectionless transport, IPX also applies to layer 4

Question 5

IPX is a routable protocol that is located at the network layer of the OSI model. Because it is also an unreliable connectionless transport, IPX also applies to layer 4—the transport layer.

What does Unreliable and connectionless mean?

Answer 5

unreliable means data is sent without acknowledgment
of receipt

connectionless means that a session is not established before transmitting.

Question 6

Because SPX runs at the _______ layer, it is considered a layer-4 protocol.

Answer 6

Network

Question 7

___________ is a transport protocol used by IPX for connection-oriented communication.

Answer 7

Sequenced Packet Exchange (SPX)

Question 8

SPX is the equivalent to ____ but for the IPX/SPX protocol suite

Answer 8

TCP

Question 9

Network communication starts at the _________ layer of the OSI model and works its way down through the layers to the ________ layer

Answer 9

Network communication starts at the application layer of the OSI model and works its way down through the layers to the physical layer

Question 10

if the presentation layer compresses the data on the sending system, the presentation layer will ___________ the data on the receiving system before passing the data up to the application layer.

Answer 10

decompress

Question 11

If we choose to compress our data from the application that we are using, the application layer will pass that request to the _________ layer and the _________ layer that does the compression.

Answer 11

presenation

Question 12

The _______ layer manages the dialog between computers

Answer 12

session

Question 13

The _______ layer establishes, manages, and terminates communications between two computers.

Answer 13

session

Question 14

What layer is responsible for the following?

In the establishment phase, the requestor initiates the service and the rules for communication between the two systems. These rules could include such things as who transmits and when, as well as how much data can be sent at a time. Both systems must agree on the rules; the rules are like the etiquette of the conversation.

Answer 14

session

Question 15

The _________ layer handles ________ functions such as reliable and unreliable delivery of the data.

Answer 15

Transport

Question 16

On the sending system, the _______ layer is responsible for breaking the data into smaller packets, so that if retransmission is required, only the packets missing will be sent.

Answer 16

transport

Question 17

Missing packets are determined by the fact that the transport layer receives _________________ from the remote system

Answer 17

acknowledgments (ACKs)

Question 18

At the receiving system, the ________ layer will be responsible for opening all of the packets and reconstructing the original message.

Answer 18

transport

Question 19

Another function of the _______ layer is segment sequencing.

Answer 19

transport

Question 20

_____________ is a connection-oriented service that takes segments that are received out of order and resequences them in the right order. This occurs on the _________ layer.

Answer 20

Sequencing is a connection-oriented service that takes segments that are received out of order and resequences them in the right order.

This occurs on the transport layer.

Question 21

___________ addresses also are called sockets or ports by protocols such as TCP/IP.

Answer 21

Service

Question 22

The ____________ layer also enables the option of specifying a “service address” for the services or application on the source and destination computers to specify what application the request came from and what application the request is headed for.

Answer 22

The transport layer also enables the option of specifying a “service address” for the services or application on the source and destination computers to specify what application the request came from and what application the request is headed for.

Question 23

All modern operating systems run many programs at once, and each program has a unique _________________.

Answer 23

service address

Question 24

IP does not ensure the delivery of the packets; that is the responsibility of higher-layer protocols, such as ____

Answer 24

Internet Protocol (IP)

Question 25

_______________ in the TCP/IP protocol suite performs the same routing functions that IPX does for the IPX/SPX protocol suite.

Answer 25

The Internet Protocol (IP)

Question 26

Although IPX runs at layer 3 (network layer) and layer 4 (transport layer), the Network+ exam places it at __________ .

Answer 26

layer 3

Question 27

The logical address that IP uses is known as an ________ and looks similar to 192.168.3.200

Answer 27

IP address

Question 28

IP is a _______-layer protocol and is responsible for logical

addressing—as a result, an IP address is referred to as a ______ address.

Answer 28

IP is a network-layer protocol and is responsible for logical

addressing—as a result, an IP address is referred to as a layer-3 address.

Question 29

Give an example of a logical address and a physical address

Answer 29

An ip address is a logical address and mac address is a physical addresss

Question 30

The _________ address is responsible for identifying the network the system resides on along with an address of the system, whereas a ________ address is very flat and identifies only the physical system on the LAN—not “where” the system resides.

Answer 30

The logical address is responsible for identifying the network the system resides on along with an address of the system, whereas a MAC address is very flat and identifies only the physical system on the LAN—not “where” the system resides.

Question 31

The Transmission Control Protocol (TCP) is a _________-layer protocol

Answer 31

transport

Question 32

What layer is the UDP protocal on?

Answer 32

Layer-4 Tranport layer

Question 33

What protocal is used to deliver both UDP and TCP?

Answer 33

IP

Question 34

_____________ is a protocol for file sharing that enables a user
to use network disks as though they were connected to the local machine. It also enables you to share printers.

Answer 34

NFS Network File System

Question 35

NFS is located in the ___________ layer of the OSI model and is considered a member of the TCP/IP protocol suite.

Answer 35

Application

Question 36

Microsoft’s Server Message Block (SMB) and Novell’s NetWare Core Protocol (NCP) are protocols that are implemented in ___________

Answer 36

redirectors

Question 37

___________ is software that intercepts requests, formats them according to the protocol in use, and passes the message to a lower-level protocol for delivery.

Answer 37

redirector

Question 38

SMB and NCP are considered _________-layer protocols.

Answer 38

application

Question 39

The mac address is on the which layer of the OSI Model

Answer 39

Layer 2 (Datalink Layer)

Question 40

IP operates at which level of the OSI layer?

Answer 40

Level 3 (Network Layer)