Chapter 2: Network Models Flashcards Preview

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Flashcards in Chapter 2: Network Models Deck (46):
1

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

physical

2

A NIC sends data in discrete chunks called ______.

frames

3

An IP address is also known as a _______ address.

logical

4

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

Data Link (Layer 2)

5

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

Internet

6

How much data can a typical frame hold?

1500 bytes

7

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

Link

8

Is TCP connection-oriented or connectionless?

Connection-oriented

9

Is UDP connection-oriented or connectionless?

Connectionless

10

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

Sequencing Numbers

11

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

Packets

12

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

-Organizationally Unique Identifier (OUI)

13

What are the four layers of TCP/IP?

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

14

What are the seven layers of the OSI model?

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

15

What are the two sublayers of the Data Link Layer?

1) Logical Link Control (LLC)
2) Media Access Control (MAC)

16

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

1) IP address
2) MAC address

17

What device uses IP addresses?

Router

18

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

It sends a broadcast onto the network.

19

What does de-encapsulation refer to?

Reverses the process of encapsulation
2 -> 3 -> 4 -> 5 -> 6 -> 7 -> app

20

What does encapsulation refer to?

The entire process of preparing data to go onto a network
app -> 7 -> 6 -> 5 -> 4 -> 3 -> 2 -> 1

21

What does OSI stand for?

Open Systems Interconnect

22

What does TCP/IP stand for?

Transmission Control Protocol over Internet Protocol

23

What does the FCS do?

Verifies that the data arrived correctly

24

What does the session software do?

Handles connecting applications to applications

25

What happens at the Presentation layer (Layer 6)?

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

26

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

-Talking to the system's OS
-Handling protocols
-Providing flow control

27

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

-Creates and addresses the frame
-Adds the NIC's own MAC address and attaches MAC addresses to the frames.
-Adds or checks FCS

28

What is a benefit of using frames?

Frames keep any one NIC from hogging the wire

29

What is a NIC?

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

30

What is a switch?

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

31

What is an API?

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

32

What is CRC?

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

33

What is the last layer that deals with hardware?

Network Layer

34

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

Extended Unique Identifier (EUI)-48

35

What is the structure of a basic frame?

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

36

What is the structure of a packet?

Dest. IP -> Source IP -> Data

37

What is UTP?

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

38

What are data chunks called at the Transport Layer?

Segments (for TCP)
or
Datagrams (for UDP)

39

What uniquely identifies every NIC?

Media Access Controller (MAC) address

40

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

ipconfig /all

41

Where does a hub send data?

To all systems connected to the hub.

42

Which layer are cabling and the central box part of?

Physical (Layer 1)

43

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

Physical (Layer 1)

44

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

The Session Layer (Layer 5)

45

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

The Transport Layer

46

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

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