Chapter 3 Fundamentals Of WANs And IP Routing

Question 1

WAN

Answer 1

Wide Area Network. it is a collection of LANs or how LANs communicate

Question 2

Leased line

Answer 2

A serial communication circuit between two points provided by a service provider, typically a telephone company or Telco.

Question 3

HDLC

Answer 3

HDLC. High level data link control. This is a data link protocol for leased lines. They have a similar header to ethernet.

Flag - list recognizable bit pattern so that the receiving knows realize that a new frame is arriving.

Address - destination device

Control - legacy ( not really used

Type - ipv4 or 6

FCS - error detection

Question 4

T1, speed

Answer 4

This is a leased line

1.544 Mbps

Question 5

PPP

Answer 5

Point to point protocol. This is a data link protocol for leased lines.

Question 6

MPLS

Answer 6

Multiprotocol label switching. It is a routine technique used by telecommunications networks that directs data from one node to the next based on short path labels.

Question 7

PoP

Answer 7

Point of presence is where your network connects to the service providers.

Question 8

Ethernet emulation

Answer 8

A term emphasizing that the link is not a literal ethernet link from end to end.

Question 9

Eompls

Answer 9

Ethernet over multiprotocol labeling service. This will use the 802.3 Ethernet protocol

Question 10

ARP

Answer 10

Address Resolution Protocol. ARP dynamically learns the data link address(mac address) of an IP host connected to a LAN.

Question 11

DNS

Answer 11

Domain Name Systems. Translates IP addresses into hostnames.

Question 12

ICMP

Answer 12

Internet control method protocol. Is the protocol for the ping command which sends an ICMP echo to an IP address to test connectivity. If it receives an echo reply back then it was successful.

Question 13

Unicast address

Answer 13

An IP address that represents a single interface.