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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
Which of the following are application layer protocols in the TCP/IP reference model?
File Transfer Protocol (FTP) Simple Network Management Protocol (SNMP)
20
Which of the following are functions of the presentation layer of the OSI model?
Data encryption Character-code translation Data compression
20
Which of the following are implemented at the transport layer?
User Datagram Protocol (UDP) Transmission Control Protocol (TCP)
21
Which of the following are layers of the OSI model?
Physical Transport Session
23
Which of the following could be a valid MAC address for a server named Server 1?
A4-BA-DB-FA-60-AD
25
Which of the following devices operates at the network layer of the OSI model?
Router
26
Which of the following devices work at the data link layer of the OSI reference model?
Switches Bridges
27
Which of the following is a data packet on Layer 2 of the OSI model?
Frame
31
Which of the following is a Layer 1 device?
Repeater
32
Which of the following is a Layer 2 device?
Switch
33
Which of the following is a Layer 3 device?
Router
34
Which of the following is a set of rules that provide guidelines for computer communication?
Protocol
34
Which of the following is a type of firewall used to filter traffic on the basis of packet content?
Application-layer
36
Which of the following is an access method defined in the 802.5 specification?
Token passing
37
Which of the following is used to characterize and standardize the functions of a communications system in terms of abstraction layers?
OSI
39
Which of the following LAN protocols use token passing for exchanging signals among various stations on the network?
Token ring (IEEE 802.5) Fiber Distributed Data Interface (FDDI)
40
Which of the following layers of the OSI model establishes a communication session between processes running on different communication entities in a network?
Session
41
Which of the following layers of the OSI model is responsible for transmitting data on the cable?
Physical
42
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?
Layer 5 (session layer)
43
Which of the following is a function of layer 3?
To provide address information required to route data between different networks
44
Which of the following layers provides mechanisms to transport data between network devices through error checking, service addressing, and segmentation?
Transport
44
Which of the following is a function of the transport layer in the OSI model?
To manage a packet sequence
45
Which of the following layers synchronizes data exchange between applications on separate devices?
Session
46
Which of the following network technologies uses 53-byte cells to transfer data?
ATM (Asynchronous Transfer Mode)
47
Which of the following operates at the transport layer of the TCP/IP reference model?
Transmission Control Protocol (TCP)
49
Which of the following OSI layers is responsible for a reliable connection between two hosts on a TCP/IP network?
Transport layer (layer 4)
51
Which of the following OSI model layers identifies the topology used in a network?
Physical
52
Which of the following ports is used for HTTP?
80
53
Which of the following ports is used for POP3?
110
54
Which of the following ports is used for SMTP?
25
55
Which of the following protocols is designed to efficiently handle high-speed data over WANs (wide area networks)?
Frame relay
56
Which of the following statements are true about the session layer of the OSI model
It establishes a virtual-circuit session. It manages and terminates connections between applications.
57
Which of the following tasks are performed by the session layer of the OSI model?
Connection establishment Connection release
58
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?
Data frames

Networking Fundamentals (21 decks)

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