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5. Networks > Chapter 2: Network Models > Flashcards

Chapter 2: Network Models Flashcards

1
Q

A MAC address is known as a(n) ____ address.

A

physical

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2
Q

A NIC sends data in discrete chunks called ______.

A

frames

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3
Q

An IP address is also known as a _______ address.

A

logical

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4
Q

Any device that deals with a MAC address is part of which layer of the OSI model?

A

Data Link (Layer 2)

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5
Q

Anything that deals with pure IP packets (getting an IP packet to its destination) sits in the _______ layer.

A

Internet

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6
Q

How much data can a typical frame hold?

A

1500 bytes

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7
Q

In the TCP/IP model, any part of the network that deals with complete frames is in the ______ layer.

A

Link

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8
Q

Is TCP connection-oriented or connectionless?

A

Connection-oriented

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9
Q

Is UDP connection-oriented or connectionless?

A

Connectionless

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10
Q

What are segments/datagrams given to help the receiving system know the total # of segments/datagrams and how to put them together?

A

Sequencing Numbers

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11
Q

What are the chunks of data called at the Network Layer (Layer 3)?

A

Packets

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12
Q

What are the first 3 tuples of a MAC address called?

The last 3?

A

-Organizationally Unique Identifier (OUI)

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13
Q

What are the four layers of TCP/IP?

A

4) Application
3) Transport
2) Internet
1) Link/Network Interface

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14
Q

What are the seven layers of the OSI model?

A

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

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15
Q

What are the two sublayers of the Data Link Layer?

A

1) Logical Link Control (LLC)

2) Media Access Control (MAC)

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16
Q

What are the two unique identifiers that each system has in a TCP/IP network?

A

1) IP address

2) MAC address

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17
Q

What device uses IP addresses?

A

Router

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18
Q

What does a NIC do if it doesn’t know the MAC address it’s trying to reach?

A

It sends a broadcast onto the network.

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19
Q

What does de-encapsulation refer to?

A

Reverses the process of encapsulation

2 -> 3 -> 4 -> 5 -> 6 -> 7 -> app

20
Q

What does encapsulation refer to?

A

The entire process of preparing data to go onto a network

app -> 7 -> 6 -> 5 -> 4 -> 3 -> 2 -> 1

21
Q

What does OSI stand for?

A

Open Systems Interconnect

22
Q

What does TCP/IP stand for?

A

Transmission Control Protocol over Internet Protocol

23
Q

What does the FCS do?

A

Verifies that the data arrived correctly

24
Q

What does the session software do?

A

Handles connecting applications to applications

25
Q

What happens at the Presentation layer (Layer 6)?

A

Data from lower layers is translated into a format usable by the Application layer and vice versa.

26
Q

What happens in the Logical Link Control (LLC) sublayer?

A
  • Talking to the system’s OS
  • Handling protocols
  • Providing flow control
27
Q

What happens in the Media Access Control (MAC) sublayer?

A
  • Creates and addresses the frame
  • Adds the NIC’s own MAC address and attaches MAC addresses to the frames.
  • Adds or checks FCS
28
Q

What is a benefit of using frames?

A

Frames keep any one NIC from hogging the wire

29
Q

What is a NIC?

A

The Network Interface Card serves as the interface between the PC and the network.

30
Q

What is a switch?

A

A switch is a device that filters traffic by MAC address to get data to the correct places.

31
Q

What is an API?

A

An Application Programming Interface provides a standard way for programmers to enhance or extend applications’ capabilities.

32
Q

What is CRC?

A

Cyclic Redundancy Check is what FCS uses to ensure data arrived correctly.

33
Q

What is the last layer that deals with hardware?

A

Network Layer

34
Q

What is the numbering namespace from which MAC address come from called?

A

Extended Unique Identifier (EUI)-48

35
Q

What is the structure of a basic frame?

A

Receiving MAC -> Sending MAC -> type -> data -> Frame Check Sequence (FCS)

36
Q

What is the structure of a packet?

A

Dest. IP -> Source IP -> Data

37
Q

What is UTP?

A

Unshielded Twisted Pair is a type of cable usually containing 4 pairs of wires that can transmit and receive data

38
Q

What are data chunks called at the Transport Layer?

A

Segments (for TCP)
or
Datagrams (for UDP)

39
Q

What uniquely identifies every NIC?

A

Media Access Controller (MAC) address

40
Q

What Windows utility do you use to find the MAC address for a system?

A

ipconfig /all

41
Q

Where does a hub send data?

A

To all systems connected to the hub.

42
Q

Which layer are cabling and the central box part of?

A

Physical (Layer 1)

43
Q

Which layer of OSI defines the method of moving data between two computers?

A

Physical (Layer 1)

44
Q

Which layer of the OSI seven-layer model keeps track of a system’s connections to send the right response to the right computer?

A

The Session Layer (Layer 5)

45
Q

Which layer of the TCP/IP model controls the assembly and disassembly of data?

A

The Transport Layer

46
Q

Which of the following is an example of a MAC address?

A) 0-255
B) 00-50-56-A3-04-0C
C) SBY3M7
D) 192.168.4.13

A

B) 00-50-56-A3-04-0C

5. Networks (22 decks)

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