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Networking Fundamentals > Lesson 3 - Test > Flashcards

Lesson 3 - Test Flashcards

1
Q

At which of the following OSI layers does the hub operate?

A

Physical

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1
Q

At which layer of the OSI model is the Media access control (MAC) address implemented?

A

Data-link layer

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2
Q

By default, which of the following ports is used by the DNS service?

A

53

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2
Q

Communication within layers is logical or virtual

A
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3
Q

IP operates at which of the following layers?

A

Network

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3
Q

How many layers are in the TCP/IP model?

A

4

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4
Q

Match OSI and TCP/IP models to reference points for the devices used on a network.

A
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5
Q

Match OSI layers to with their descriptions.

A

Transport: Divides long communications into smaller data packages, and handles error recognition and correction

Datalink: Packages bits of data from the physical layer into frames

Network: Addresses data messages and translates logical addresses into physical ones

Physical: Transmits bits from one computer to another and regulates the transmission stream over a medium

Presentation: Translates application layer data to an intermediate form that provides security, encryption, and compression for the data

Application: Allows programs on a network node (computer) access network services, such as file transfers, electronic mail, and database access

Session: Establishes and controls data communication between applications operating on two computers

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5
Q

Match protocols used in those layers of the TCP/IP architecture.

A
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6
Q

Match the modes of transmission of the Session layer with their descriptions.

A

Simplex: Data can be sent only one way. Full Duplex: Data can be sent and received at the same tie. Half Duplex: Data can be sent both ways but only one way at a time.

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7
Q

On which OSI layer does the UDP protocol work?

A

Transport

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8
Q

Which OSI model which is responsible for connectionless communication, host address, and message forwarding

A
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10
Q

Proxy servers operate on which of the following layers of the OSI Model?

A

Proxy servers operate on the Application layer, layer 7

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10
Q

Routers operate on which of the following layers of the OSI Model?

A

Routers operate on the Network layer, layer 3.

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11
Q

Select the devices and protocols for the layers of the TCP/OSI model.

A

Application Layer: Proxy server: DNS Network Layer: Router: IPv4 Data Link Layer: Bridge: Token ring Physical: Hub: Ethernet

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12
Q

Select the protocols of the Application layer according to their descriptions.

A

Http: To transmit data across the internet for web pages DHCP: To dynamically assigning TCP/IP configuration information IMAP: To receive email messages SMB: To transfer files on Microsoft networks DNS: To resolve host names to IP addresses

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13
Q

TCP operates at which of the following layers?

A

Transport

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13
Q

TCP/IP Layers

A

Application Layer

Transportation Layer

Internet Layer

Network Interface Layer

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15
Q

The ____ layer provides access to the network for applications and certain user functions. It displays incoming information and prepares outgoing information for network access.

A

Application

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16
Q

True or false. TCP is a connectionless protocol.

A

False

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16
Q

True or false. Devices that operate on layer 7 of the OSI Model are more intelligent than devices that operate on layer 1.

A

True

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17
Q

What is a unit of data called at the Transport layer?

A

Segment

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18
Q

What is the function of the session layer of the OSI model?

A

Provide dialog management. Assist the upper layers in connecting to services on the network.

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19
Q

Which of the following are functions of the application layer of the OSI model?

A

To provide file, print, and message services To provide protocols for service use To provide protocols for service advertisement

19
Q

Which of the following are application layer protocols in the TCP/IP reference model?

A

File Transfer Protocol (FTP) Simple Network Management Protocol (SNMP)

20
Q

Which of the following are functions of the presentation layer of the OSI model?

A

Data encryption Character-code translation Data compression

20
Q

Which of the following are implemented at the transport layer?

A

User Datagram Protocol (UDP) Transmission Control Protocol (TCP)

21
Q

Which of the following are layers of the OSI model?

A

Physical

Transport

Session

23
Q

Which of the following could be a valid MAC address for a server named Server 1?

A

A4-BA-DB-FA-60-AD

25
Q

Which of the following devices operates at the network layer of the OSI model?

A

Router

26
Q

Which of the following devices work at the data link layer of the OSI reference model?

A

Switches Bridges

27
Q

Which of the following is a data packet on Layer 2 of the OSI model?

A

Frame

31
Q

Which of the following is a Layer 1 device?

A

Repeater

32
Q

Which of the following is a Layer 2 device?

A

Switch

33
Q

Which of the following is a Layer 3 device?

A

Router

34
Q

Which of the following is a set of rules that provide guidelines for computer communication?

A

Protocol

34
Q

Which of the following is a type of firewall used to filter traffic on the basis of packet content?

A

Application-layer

36
Q

Which of the following is an access method defined in the 802.5 specification?

A

Token passing

37
Q

Which of the following is used to characterize and standardize the functions of a communications system in terms of abstraction layers?

A

OSI

39
Q

Which of the following LAN protocols use token passing for exchanging signals among various stations on the network?

A

Token ring (IEEE 802.5) Fiber Distributed Data Interface (FDDI)

40
Q

Which of the following layers of the OSI model establishes a communication session between processes running on different communication entities in a network?

A

Session

41
Q

Which of the following layers of the OSI model is responsible for transmitting data on the cable?

A

Physical

42
Q

Which of the following layers of the OSI model is responsible for establishing a communication session between the processes running on different communication entities in a network?

A

Layer 5 (session layer)

43
Q

Which of the following is a function of layer 3?

A

To provide address information required to route data between different networks

44
Q

Which of the following layers provides mechanisms to transport data between network devices through error checking, service addressing, and segmentation?

A

Transport

44
Q

Which of the following is a function of the transport layer in the OSI model?

A

To manage a packet sequence

45
Q

Which of the following layers synchronizes data exchange between applications on separate devices?

A

Session

46
Q

Which of the following network technologies uses 53-byte cells to transfer data?

A

ATM (Asynchronous Transfer Mode)

47
Q

Which of the following operates at the transport layer of the TCP/IP reference model?

A

Transmission Control Protocol (TCP)

49
Q

Which of the following OSI layers is responsible for a reliable connection between two hosts on a TCP/IP network?

A

Transport layer (layer 4)

51
Q

Which of the following OSI model layers identifies the topology used in a network?

A

Physical

52
Q

Which of the following ports is used for HTTP?

A

80

53
Q

Which of the following ports is used for POP3?

A

110

54
Q

Which of the following ports is used for SMTP?

A

25

55
Q

Which of the following protocols is designed to efficiently handle high-speed data over WANs (wide area networks)?

A

Frame relay

56
Q

Which of the following statements are true about the session layer of the OSI model

A

It establishes a virtual-circuit session. It manages and terminates connections between applications.

57
Q

Which of the following tasks are performed by the session layer of the OSI model?

A

Connection establishment Connection release

58
Q

Which of the following units of data does the data-link layer send from the network layer to the physical layer of the OSI model?

A

Data frames

Networking Fundamentals (21 decks)

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