Exam Review

Question 1

EIA/TIA

Answer 1

Writes network cable guidelines

Question 2

IEEE

Answer 2

Electronic engineering standards

Question 3

ISO

Answer 3

Technological standards

Question 4

IANA and ICANN

Answer 4

IANA - REcords and doles out IP Addresses

ICANN - Domain name and IP assignment

Question 5

Transmission channel capacity

Answer 5

C = 2B with no noise
More noise = less signal
Measured in bps
The difference btw. highest & lowest frequencies a medium can transmit

Question 6

ASK Modulation

Answer 6

Amplitude Shift Keying

Question 7

What is Decibel?

Answer 7

Relative measure if signal loss or gain

Question 8

What is dBW?

Answer 8

Decibel Watts

Measure of amplification relative to previous Db level

Question 9

PSK

Answer 9

DIGITAL MODULATION - Phase shift keying

Question 10

FSK

Answer 10

Frequency shift keying

Question 11

QAM

Answer 11

Combination of ASK and PSK

Modems modulate by QAM

Question 12

What is modulation?

Answer 12

Move signal from low to high frequency
Amplitude - ASK
Frequency - FSK
Phase - PSK
QAM = ASK +PSK

Question 13

Relationship btw. signal and frequency?

Answer 13

Higher signal = higher frequency

Question 14

What does a repeater do?

Answer 14

Cleans noise

Question 15

Baud rate

Answer 15

How many times per second a signal changes

Question 16

Bit rate

Answer 16

Speed of data transmission (bps)

Question 17

Propagation delay

Answer 17

Delay b/c distance

Question 18

Transmission delay

Answer 18

Hardware/ cable limits

Question 19

Round Trip Delay

Answer 19

Speed + Distance + ACK

Question 20

Repeater

Answer 20

Repeats a signal to prevent weakness/noise from distance
One input / One Output
Inexpensive network expansion
BUS Topology networks

Question 21

Hub

Answer 21

Repeater w/ more than one output port

Question 22

Repeater / Hub Layer

Answer 22

Physical

Question 23

Switch

Answer 23

Subdivide network into segments

Question 24

Bridge

Answer 24

Connects segments by analyzing frames & directs them to the correct MAC address

Question 25

Bridge Layer

Answer 25

Physical and Link Layer

Question 26

Switch Layer

Answer 26

Physical and data link

Question 27

Router

Answer 27

Determines the bast path btw. modes - load balancing | Logical addressing - connects LANS and WANS

Question 28

Router Layer

Answer 28

Network

Question 29

Best fiber

Answer 29

Single Mode

Question 30

Slower fiber

Answer 30

Multimode

Question 31

RJ45 Connector Type

Answer 31

STP and UTP - Registered Jack

Question 32

ST Connector

Answer 32

Straight Tip for Fiber

Question 33

SC Connector

Answer 33

Subscriber Connector for Fiber

Question 34

LC Connector

Answer 34

Local Connector - Fiber

Question 35

MPLS Switching

Answer 35

Multiprotocol Label Switching | Uses packet-switching on circuit-switched networks.

Question 36

VLAN Trunking

Answer 36

Enables the movement of traffic to different parts of the network configured in a VLAN. Point-to-point link.

Question 37

Cat 3 speed

Answer 37

up to 10 Mbps

Question 38

Cat 5e Speed

Answer 38

up to 1 Gbps of throughput at a distance of up to 100 meters

Question 39

100BaseTx Cable

Answer 39

Copper. The predominant form of Fast Ethernet, and runs over two wire-pairs inside a *category 5 or above cable

Question 40

1000Base-SX Cable

Answer 40

MMF. Distance capability between 220m and 550 m

Question 41

1000Base-LX Cable

Answer 41

MMF with a maximum segment length of 550 m

Question 42

UDP

Answer 42

Fast but unreliable Transport datagram control Unreliable b/c no verification - just blasts data PROS: Efficient & Simple

Question 43

Primary function of TCP and UDP protocols

Answer 43

``` Service multiplexing (Transport layer) Service delivery between processes ```

Question 44

What is service multiplexing?

Answer 44

Delivering multiple services on the same IP | TCP and UDP protocols - Transport Layer

Question 45

TCP and UDP common ports

Answer 45

TCP - 80 for web service | UDP - 53 for DNS Service

Question 46

Why use TCP/IP ports?

Answer 46

Many applications can function simultaneously on an IP host

Question 47

What does TCP do?

Answer 47

Connection-oriented & reliable transport protocol. | Negotiates, establishes, and terminates host-to-host connections