Networking Fundamentals CH1-5

Question 1

What is TCP/IP

Answer 1

Transmission Control Protocol and Internet Protocol. Most common network model used in enterprise networks.

Question 2

OSI

Answer 2

Opening System Interconnection. Created by ISO(International Organization for Standardization) to standardize data networking protocols to allow communication between all computers in the world.

Question 3

RFC

Answer 3

Requests for Comments. documents used by TCP/IP to define protocols.

Question 4

HTTP

Answer 4

Hypertext Transfer Protocol. Application Layer of TCP/IP. Mostly related to web browser.

Question 5

UDP

Answer 5

User Datagram Protocol. Along with TCP, it is a transport layer.

Question 6

DDN

Answer 6

Dotted-Decimal Notation: 4 sets of number separated by periods and are used as IP address. example: 1.1.1.1

Question 7

UTP

Answer 7

Unshielded Twisted Paired

Question 8

OUI

Answer 8

Organizationally Unique Identifier is an IEEE assigned 3-byte code to the first part of the MAC address for its uniqueness. The manufacturer will assign the last 3-byte of the MAC address.

Question 9

WAN

Answer 9

Wide Area Network

Question 10

CPE

Answer 10

Customer Premises Equipment

Question 11

CSU/DSU

Answer 11

Channel Service Unit/Data Service Unit, part of CPE and it can be integrated with the router.

Question 12

DTE cable

Answer 12

Data Terminal Equipment, it has a male connector. It acts like a straight-through cable and does not swap the transmit pair.

Question 13

DCE cable

Answer 13

Data Communication Equipment, it has a female connector. It swaps transmit like a cross-over.

Question 14

HDLC

Answer 14

High-Level Data Link Control, layer 2 encapsulation method

Question 15

PPP

Answer 15

Point to Point Protocol, layer 2 encapsulation method.

Question 16

FCS

Answer 16

Frame Check Sequences (trailer of data link layer).

Question 17

EoMPLS

Answer 17

Mutiprotocol Label Switching. Provide Point to point connection between two devices. Behavior as if a fiber Ethernet link existed between the two devices.

Question 18

PoP

Answer 18

Point of Presence. A SP location that connects to a customer building via Fiber Cable ie 1000BASE-LX or 1000BASE-ZX(70km max length).

Question 19

DSL

Answer 19

Digital Subscriber Line, one of the most used technologies for SOHO use to connect to the Internet via phone lines.

Question 20

DSLAM

Answer 20

DLS Access Multiplexer. Receive/send data to DSL internet/phone users via phone lines. It splits out the voice signals over to the voice switch; and send the data to the router.

Question 21

serial cable

Answer 21

connect the router and CSU/DSU if they are separated CPEs

Question 22

ARP

Answer 22

IP Address Resolution Protocol. Dynamically learns the data link address of an IP host connected to a LAN.

Question 23

DDN

Answer 23

Dotted-Decimal Notation. Use to represent IP address with four byes(octets).

Question 24

Convergence time

Answer 24

The time between losing the route and finding a working replacement route. One of the goals of a routing protocol.

Question 25

DNS

Answer 25

Domain Name System. A way o let a computer find the IP address used by the listed host name.

Question 26

ARP

Answer 26

Address Resolution Protocol. Request of MAC ID

Question 27

Ping

Answer 27

Packet Internet Groper, uses the Internet Control Message Protocol (ICMP) sending a message called ICMP echo request to another IP address. The computer with that IP address should reply with an ICMP echo reply