Vol 1 Part 1: Intro to Networking Flashcards Preview

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Flashcards in Vol 1 Part 1: Intro to Networking Deck (42)
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1

Which of the following are layer 4 protocols?
A. Ethernet
B. HTTP
C. TCP
D. IP

C. TCP

2

What are the 5 layers of the TCP/IP Model?

Layer 1: Physical
Layer 2: Data link
Layer 3: Network (Also called Internet)
Layer 4: Transport
Layer 5: Application

3

What are the names of the units at each layer in the TCP/IP Model?

Layer 1: Bits
Layer 2: Frames
Layer 3: Packets
Layer 4: Segments
Layer 5: Data

4

What protocol operates at layer 1 and layer 2?

Ethernet (802.3) and Wi-Fi (802.11)

5

What protocol operates at layer 3?

IP and ICMP

6

What protocol operates at layer 4?

TCP/UDP

7

What protocol operates at layer 5?

HTTP

8

Error recovery operates at what layer?

Layer 3, network layer

9

Error detection operates at what layer?

Layer 2, data link layer

10

With TCP, what is used to conduct error recovery?

Sequences (SEQ) and Acknowledgements (ACK)

11

With HTTP, what message does the client send to the server, and what message does the server then send back to the client?

GET followed by OK

12

What is utilized from the frame to conduct error detection?

The Frame Check Sequence (FCS)

13

What are the three components of the frame?

header, data, trailer

14

The process of HTTP asking TCP to send some data and making sure it is received correctly is referred to as what kind of interaction?

Adjacent layer interaction

15

The process of a web server adding a TCP header to the contents of a web page, followed by ading an IP header, and then adding a data-link header and trailer, is an example of what?

Data encapsulation

16

Ethernet cables are twisted in order to reduce what?

Electromagnetic interference and crosstalk on the cable.

17

A straight through cable utilizes what pins?

1, 2, 3, and 6

18

What pins are flipped on a cross over cable?

white-orange with white-green, and orange with green

19

A straight through cable is used when connecting what type of devices?

Dissimilar devices (computer to a hub or a switch)

20

A crossover cable is used when connecting what type of devices?

Similar (switch to switch, computer to computer)

21

1000BASE-LX is what kind of cable, and how do you know?

Fiber. The X indicates it is a fiber cable.

22

What is the difference between multimode and singlemode fiber?

Multimode is faster but travels a smaller distance (500m), singlemode is slower but can travel a much further distance (40km)

23

What is the minimum and maximum allowed size of data within a frame?

46 bytes and 1500 byes

24

A frame larger than 1518 bytes but smaller than 1600 bytes is known as a what?

Baby giant

25

What does the type refer to within a frame?

IPv4 vs IPv6

26

Where in the frame is the FCS located?

The trailer

27

How many bits are in a MAC address, what kind of characters are used, and explain the different parts of the address?

48bits/6bytes. 12 characters in Hexadecimal. The first 24 bits are the Organizational Unique Identifier (OUI) and reveal who made the device. The last 24 bits are vendor assigned.

28

What is the difference between full duplex and half duplex?

Full duplex allows a device to send and receive at the same time. Half duplex limits the device to doing one at a time.

29

What type of leased line transmits data at 1.544 megabits per second?

T1

30

What are the two types of serial WAN link proocols, and who uses them?

HLDC and PPP. HLDC is Cisco proprietary while PPP is vendor neutral and used more often than HLDC.