CCNA 2 1

Question 1

A WAN operates at the —– of the OSI reference model.

Answer 1

physical layer and the
data link layer

Question 2

—- provide for the exchange of data packets
and frames between routers and switches and
the LANs they support.

Answer 2

WANs

Question 3

HDLC

Answer 3

High Level Data Link Control

Question 4

PPP

Answer 4

Point to point protocol

Question 5

It describe how to
provide electrical, mechanical, operational, and
functional connections for WAN services

Answer 5

WAN physical layer protocols

Question 6

It describe how frames are
carried between systems on a single data link.

Answer 6

WAN data link protocols

Question 7

SDLC

Answer 7

Synchronous Data Link Control

Question 8

CRC

Answer 8

Cycle Redundancy Check

Question 9

ISDN

Answer 9

Integerated Service Digital Network

Question 10

Typical WAN Layer 2 Links

Answer 10

Leased Line
Packet Switched
Circuit Switched

Question 11

í Designed to carry IP packets
í Being replaced by PPP

Answer 11

SLIP

Question 12

SLIP

Answer 12

í Serial Line Interface Protocol

Question 13

í Support multiple network layer
protocols (IP, IPX, DecNET)
í Operates over sync. or async. links

Answer 13

PPP

Question 14

PPP

Answer 14

í Point-to-Point Protocol

Question 15

í IBM designed protocol
í Point-to-point & multipoint links
í Operates over sync. links

Answer 15

SDLC

Question 16

SDLC

Answer 16

í Synchronous Data Link Control
Protocol

Question 17

í IEEE standard from SDLC
í Point-to-point and multipoint links
í Operates over sync. links

Answer 17

• HDLC
  í High-Level Data Link Control

Question 18

HDLC

Answer 18

í High-Level Data Link Control

Question 19

í used by X.25 protocol

Answer 19

LAPB

Question 20

LAPB

Answer 20

í Link Access Procedure Balanced

Question 21

í ISDN D-Channel for control signal

Answer 21

LAPD
í Link Access Procedure D-channel

Question 22

í Used in Frame Relay for fast frame
switching over high-quality digital
facilities

Answer 22

LAPF

Question 23

is a special type of
computer. It has a CPU, memory,
a system bus, and various
input/output interfaces.

Answer 23

A router

Question 24

IOS

Answer 24

Internetwork
Operating System

Question 25

It executes instructions in the operating system. Among these functions are system initialization, routing functions, and network interface control.

Answer 25

The Central Processing Unit (CPU)

Question 26

is a microprocessor. Large routers may have multiple of this.

Answer 26

The CPU

Question 27

it provides run time space for executable Cisco IOS software and its subsystems.

Answer 27

RAM

Question 28

--- is usually logically divided into main processor memory and shared input/output (I/O) memory.

Answer 28

RAM

Question 29

--- can be upgraded by adding additional Dual In-Line Memory Modules (DIMMs).

Answer 29

RAM

Question 30

EEPROM

Answer 30

Electrically Erasable Programmable Read Only Memory

Question 31

PCMCIA

Answer 31

Personal Computer Memory Card International Association

Question 32

Holds the operating system image (IOS)

Answer 32

FLASH

Question 33

It provides the necessary power to operate the internal components.

Answer 33

The power supply

Question 34

EIA/TIA

Answer 34

Electronic Industries Association and Telecommunications Industry Alliance)