Semester 2 final exam Semester 2 final exam REVIEWREVIEW

20112011

CHAPTER 1CHAPTER 1

What is the speed of a T1 line?What is the speed of a T1 line? 1.544 Mbps1.544 Mbps

What layer does PING test?What layer does PING test? Layer 3Layer 3

What does PING send?What does PING send? AN ECHO REQUESTAN ECHO REQUEST

What does the time show when you What does the time show when you issue a PING?issue a PING? THE TIME BETWEEN WHEN PACKET THE TIME BETWEEN WHEN PACKET

IS SENT AND RECEIVEDIS SENT AND RECEIVED

CHAPTER 1CHAPTER 1

PC1 pings the IP address of PC2. PC1 pings the IP address of PC2. What does PC1 send by doing the What does PC1 send by doing the PING?PING? An echo request messageAn echo request message

PC2 responds to PC1 with what?PC2 responds to PC1 with what? An echo reply messageAn echo reply message

What is the difference between PING What is the difference between PING and TRACERT?and TRACERT? Ping shows a reply from the devicePing shows a reply from the device Tracert shows the path it tooTracert shows the path it too

CHAPTER 1CHAPTER 1

What does the word “scalable” What does the word “scalable” mean?mean? The ability to growThe ability to grow

What things are at Layer 1?What things are at Layer 1? Hubs, transcievers, cables, Hubs, transcievers, cables,

waves, electrical issuewaves, electrical issue

CHAPTER 2CHAPTER 2

What kind of cable is used to What kind of cable is used to connect a switch to a switch?connect a switch to a switch? A crossoverA crossover

What kind of cable is used to What kind of cable is used to connect a switch to a hub?connect a switch to a hub? A crossoverA crossover

What kind of cable is used to What kind of cable is used to connect a switch to a router?connect a switch to a router? A straight throughA straight through

What kind of cable is used to What kind of cable is used to connect a computer directly to a to a connect a computer directly to a to a router’s ethernet port?router’s ethernet port? A crossoverA crossover

CHAPTER 2CHAPTER 2

What kind of cable is used to What kind of cable is used to connect a hub to a hub?connect a hub to a hub? A crossoverA crossover

What kind of cable is used to What kind of cable is used to connect a switch to a pc’s ethernet connect a switch to a pc’s ethernet port?port? A straight throughA straight through

What kind of cable is used to What kind of cable is used to connect a computer’s comport a connect a computer’s comport a router in order to configure the router in order to configure the router?router? A rollover (console cable)A rollover (console cable)

CHAPTER 2CHAPTER 2

You have a problem with a NIC. You have a problem with a NIC. What layer is this?What layer is this? Layer 2Layer 2

Which layer has to do with Which layer has to do with Firewalls?Firewalls? Layer 4Layer 4

If you can HTTP to a site but If you can HTTP to a site but you can’t FTP to the same site, you can’t FTP to the same site, what might be the problem?what might be the problem? A misconfigured firewallA misconfigured firewall

CHAPTER 2CHAPTER 2

A customer calls and says they have A customer calls and says they have a blank screen. What do you ask a blank screen. What do you ask him?him? Is your computer plugged in/turned onIs your computer plugged in/turned on

Which level ISP help desk support Which level ISP help desk support would normally answer that would normally answer that problem?problem? Level 1Level 1

Why do we use the OSI model?Why do we use the OSI model? It divides networking communications It divides networking communications

into multiple processes that are smaller into multiple processes that are smaller and more manageableand more manageable

CHAPTER 2CHAPTER 2

You are using a top-down You are using a top-down troubleshooting approach to find troubleshooting approach to find problems. You assume it starts at problems. You assume it starts at what level?what level? Layer 7 (application)Layer 7 (application)

What would you ask the customer to What would you ask the customer to check first?check first? Can they get to a website?Can they get to a website?

A user can ping a host by IP address A user can ping a host by IP address but not Domain name. What might but not Domain name. What might be the problem?be the problem? DNSDNS

CHAPTER 2CHAPTER 2

What are POP3 and SMTP?What are POP3 and SMTP? Email protocolsEmail protocols

Sending out a technician to the site Sending out a technician to the site to solve a problem that couldn’t be to solve a problem that couldn’t be solved over the phone is a job of solved over the phone is a job of what level of ISP support personnel?what level of ISP support personnel? Level 3Level 3

After going out to solve that problem, After going out to solve that problem, what should you do afterwards?what should you do afterwards? Obtain acceptance fo the customerObtain acceptance fo the customer Document the solutionDocument the solution

CHAPTER 3CHAPTER 3

STP and UTP will travel how many STP and UTP will travel how many feet?feet? 328 feet or 100 meters328 feet or 100 meters

What kind of cable do you need to What kind of cable do you need to used as a backbone between floors used as a backbone between floors and greater and 500 meters?and greater and 500 meters? Fiber opticFiber optic

What kind of cable should be used What kind of cable should be used between an MDF and an IDF?between an MDF and an IDF? FIBER OPTICFIBER OPTIC

CHAPTER 3CHAPTER 3

What is the cabling called going What is the cabling called going from the wall jack to a patch from the wall jack to a patch panel in a wiring closet?panel in a wiring closet? Horizontal cableHorizontal cable

You have been put in charge of You have been put in charge of designing a new structured designing a new structured cabling system for a company. cabling system for a company. What should you obtain first?What should you obtain first? An accurate floorplanAn accurate floorplan

CHAPTER 4CHAPTER 4

What is NAT and what does it do?What is NAT and what does it do? Network Address TranslationNetwork Address Translation It hides your address from the rest of the world It hides your address from the rest of the world

by using a private address inside the networkby using a private address inside the network What is PAT?What is PAT?

Port Address TranslationPort Address Translation NAT overloadNAT overload

What is the difference between the two?What is the difference between the two? PAT allows you to have multiple computers PAT allows you to have multiple computers

using the same address on the outside worldusing the same address on the outside world We learned about Static and Dynamic We learned about Static and Dynamic

NAT. On what devices should you use NAT. On what devices should you use Static Nat?Static Nat? File servers that need accessed from the File servers that need accessed from the

outside worldoutside world

CHAPTER 4CHAPTER 4

What subnet mask will give you 62 What subnet mask will give you 62 computers in your network?computers in your network? 255.255.255.192255.255.255.192 2266 = 64 but you lose two so 62 computers = 64 but you lose two so 62 computers

With the subnet mask 255.255.255.224, With the subnet mask 255.255.255.224, how many computers?how many computers? 2255 = 32 but you lose two so 30 computers = 32 but you lose two so 30 computers

What subnet mask is /27?What subnet mask is /27? 255.255.255.224255.255.255.224 2255 = 32 meaning every subnet starts with a = 32 meaning every subnet starts with a

multiple of 32multiple of 32 192.168.65.0192.168.65.0 192.168.65.32192.168.65.32 192.168.65.64192.168.65.64 192.168.65.96 etc192.168.65.96 etc

CHAPTER 4CHAPTER 4

If you have a subnet mask of If you have a subnet mask of 255.255.254.0 how many computers 255.255.254.0 how many computers do you have in subnetwork?do you have in subnetwork? 2299 = 512 but you lose two so 510 = 512 but you lose two so 510

computerscomputers With the above example, how many With the above example, how many

subnetworks will you have?subnetworks will you have? 2277 = 128 subnetworks = 128 subnetworks

Why would you get the message BAD Why would you get the message BAD MASK FOR ADDRESS 10.14.14.63MASK FOR ADDRESS 10.14.14.63 YOU GET THIS MESSAGE WHEN YOU YOU GET THIS MESSAGE WHEN YOU

TRY TO PUT A BROADCAST ADDRESS TRY TO PUT A BROADCAST ADDRESS ON A INTERFACEON A INTERFACE

CHAPTER 5CHAPTER 5 WHAT IS AN SSID?WHAT IS AN SSID?

THE WIRELESS NETWORK THAT YOU ARE THE WIRELESS NETWORK THAT YOU ARE USINGUSING

WHY SHOULD YOU BROADCAST THE WHY SHOULD YOU BROADCAST THE SSID?SSID? SO YOUR USERS CAN FIND ITSO YOUR USERS CAN FIND IT

WHY WOULD YOU NOT BROADCAST WHY WOULD YOU NOT BROADCAST THE SSID?THE SSID? WHEN YOU DON’T WANT USERS ON ITWHEN YOU DON’T WANT USERS ON IT

WHY SHOULD YOU DO A WIRELESS WHY SHOULD YOU DO A WIRELESS SURVEY BEFORE YOU DEPLOY A NEW SURVEY BEFORE YOU DEPLOY A NEW NETWORK?NETWORK? IT WILL FIND THE OPTIMAL NUMBER AND IT WILL FIND THE OPTIMAL NUMBER AND

PLACEMENT OF ACCESS POINTSPLACEMENT OF ACCESS POINTS

CHAPTER 5CHAPTER 5 WHY IS DHCP USED?WHY IS DHCP USED?

IT IS A SIMPLE WAY TOGET IP ADDRESSES IT IS A SIMPLE WAY TOGET IP ADDRESSES TO HOSTSTO HOSTS

WHY WOULD YOU USE SERVICE WHY WOULD YOU USE SERVICE PASSWORD-ENCRYPTION?PASSWORD-ENCRYPTION? TO ENCRYPT THE CONSOLE ACCESS TO ENCRYPT THE CONSOLE ACCESS

PASSWORDPASSWORD DOE THE BANNER LOGIN COME AFTER DOE THE BANNER LOGIN COME AFTER

THE MOTD (MESSAGE OF THE DAY) OR THE MOTD (MESSAGE OF THE DAY) OR BEFORE?BEFORE? AFTER MOTD…BUT BEFORE THE LOGIN AFTER MOTD…BUT BEFORE THE LOGIN

CREDENTIALSCREDENTIALS WHAT DOES A DEFAULT ROUTE POINT WHAT DOES A DEFAULT ROUTE POINT

TO?TO? THE NEXT HOP ROUTER ON THE PATHTHE NEXT HOP ROUTER ON THE PATH

CHAPTER 5CHAPTER 5

WHAT DOES THIS COMMAND DO? WHAT DOES THIS COMMAND DO? R1(config)#ip route 0.0.0.0 0.0.0.0 192.168.0.2R1(config)#ip route 0.0.0.0 0.0.0.0 192.168.0.2

CREATES A DEFAULT ROUTE on R1CREATES A DEFAULT ROUTE on R1 WHAT COMMAND DO YOU NEED WHAT COMMAND DO YOU NEED

TO ENTER TO ENABLE AN TO ENTER TO ENABLE AN INTERFACE?INTERFACE? NO SHUTDOWNNO SHUTDOWN

DO YOU HAVE TO HAVE A DO YOU HAVE TO HAVE A DESCRIPTION ON AN INTERFACEDESCRIPTION ON AN INTERFACE NO----IT IS OPTIONALNO----IT IS OPTIONAL

CHAPTER 5CHAPTER 5

WHAT DOES ^ MEAN? WHAT DOES ^ MEAN? WHERE YOU HAVE A MISTAKEWHERE YOU HAVE A MISTAKE

THE COPY TFTP RUNNING-THE COPY TFTP RUNNING-CONFIG WILL COPY FROM CONFIG WILL COPY FROM WHERE ?WHERE ? A TFTP SERVERA TFTP SERVER

WHERE DOES THAT SAME WHERE DOES THAT SAME COMMAND COPY TO?COMMAND COPY TO? RAMRAM

CHAPTER 5CHAPTER 5 WHEN USING IP NEGOTIATED WHEN USING IP NEGOTIATED

WITH SDM, WHAT KIND OF WITH SDM, WHAT KIND OF ENCAPSULATION SUPPORTS ENCAPSULATION SUPPORTS AUTO IP ADDRESS ASSIGNMENT? AUTO IP ADDRESS ASSIGNMENT? PPPPPP

WHAT COLOR IS THE WHAT COLOR IS THE SYST LEDSYST LED LIGHT WHEN IT FAILS POST ?LIGHT WHEN IT FAILS POST ? AMBERAMBER

WHAT IS THE DEFAULT WHAT IS THE DEFAULT ENCAPSULATION ON SERIAL ENCAPSULATION ON SERIAL INTERFACES?INTERFACES? HDLCHDLC

CHAPTER 5CHAPTER 5 WHAT IS THE HOSTNAME COMMAND WHAT IS THE HOSTNAME COMMAND

USED FOR? USED FOR? TO CHANGE THE NAME OF THE ROUTERTO CHANGE THE NAME OF THE ROUTER

IF YOU DO NOT HAVE THE COMMAND IF YOU DO NOT HAVE THE COMMAND NO SHUTDOWN ENTERED, WILL THE NO SHUTDOWN ENTERED, WILL THE INTERFACE BE ADMINISTRATIVELY UP INTERFACE BE ADMINISTRATIVELY UP OR DOWN ?OR DOWN ? DOWN, BUT THE IP WILL SHOW UPDOWN, BUT THE IP WILL SHOW UP

WHICH TYPE OF ROUTES ARE WHICH TYPE OF ROUTES ARE AUTOMATICALLY UPDATED AND AUTOMATICALLY UPDATED AND MAINTAINED BY ROUTING MAINTAINED BY ROUTING PROTOCOLS?PROTOCOLS? DYNAMICDYNAMIC

CHAPTER 6CHAPTER 6 WHAT DOES THE 120 MEAN IN WHAT DOES THE 120 MEAN IN

10.0.5.0[120/3] VIA 10.0.2.1, 00:00:10, SERIAL 0/210.0.5.0[120/3] VIA 10.0.2.1, 00:00:10, SERIAL 0/2 THE ADMINISTRATIVE DISTANCETHE ADMINISTRATIVE DISTANCE

WHAT IS THE PURPOSE OF THE WHAT IS THE PURPOSE OF THE ROUTING PROCESS?ROUTING PROCESS? TO SELECT THE PATHS THAT ARE TO SELECT THE PATHS THAT ARE

USED TO DIRECT TRAFFIC TO USED TO DIRECT TRAFFIC TO DESTINATION NETWORKDESTINATION NETWORK

WHAT DOES 192.168.16.0 MEAN IN WHAT DOES 192.168.16.0 MEAN IN THE FOLLOWING THE FOLLOWING

R1(CONFIG)#IP ROUTE 192.168.16.0 255.255.255.0 192.168.15.1R1(CONFIG)#IP ROUTE 192.168.16.0 255.255.255.0 192.168.15.1?? THE DESTINATION YOU ARE TRYING THE DESTINATION YOU ARE TRYING

TO GET TOTO GET TO

CHAPTER 6CHAPTER 6

WHICH TYPE OF ROUTING PROTOCAL WHICH TYPE OF ROUTING PROTOCAL DEPENDS ON THE DUAL ALGORITHM DEPENDS ON THE DUAL ALGORITHM TO CALCULATE THE SHORTEST PATH?TO CALCULATE THE SHORTEST PATH? EIGRPEIGRP

WILL EIGRP USE HOPS TO MAKE ITS WILL EIGRP USE HOPS TO MAKE ITS DECISION ON WHICH ROUTE TO TAKE?DECISION ON WHICH ROUTE TO TAKE? NO…IT MIGHT GO THROUGH MORE NO…IT MIGHT GO THROUGH MORE

ROUTERS, IF THE PATH IS ACTUALLY ROUTERS, IF THE PATH IS ACTUALLY FASTERFASTER

WHAT DOES EGP STAND FOR AND WHAT DOES EGP STAND FOR AND WHAT DOES IT DO?WHAT DOES IT DO? EXTERIOR GATEWAY PROTOCOL AND IT EXTERIOR GATEWAY PROTOCOL AND IT

ROUTES BETWEEN DIFFERENT ROUTES BETWEEN DIFFERENT AUTONOMOUS SYSTEMSAUTONOMOUS SYSTEMS

AN EXAMPLE WOULD BE BGPAN EXAMPLE WOULD BE BGP

CHAPTER 6CHAPTER 6

WHAT DOES AN WHAT DOES AN RR SIGNIFY IN A SIGNIFY IN A SHOW IP ROUTE?SHOW IP ROUTE? RIP ROUTING IS USEDRIP ROUTING IS USED

WHAT DOES THE SERIAL 0/0/0 WHAT DOES THE SERIAL 0/0/0 MEAN IN THE FOLLOWING? MEAN IN THE FOLLOWING?

192.168.4.0/24 [120/1] via 192.168.4.0/24 [120/1] via 192.168.3.2, 00:00:19, serial 0/0/0192.168.3.2, 00:00:19, serial 0/0/0 THE ROUTER INTERFACE THAT THE ROUTER INTERFACE THAT

192.168.4.0 WILL SEND TO192.168.4.0 WILL SEND TO

CHAPTER 7CHAPTER 7 WE LEARNED ABOUT UDP AND TCP. WE LEARNED ABOUT UDP AND TCP.

WHICH ONE IS CONSIDERED TO BE WHICH ONE IS CONSIDERED TO BE CONNETIONLESS?CONNETIONLESS? UDP UDP

WHICH ONE USES MORE OVERHEAD? WHICH ONE USES MORE OVERHEAD? TCPTCP

WHICH ONE RETRANSMITS LOST WHICH ONE RETRANSMITS LOST PACKAGES?PACKAGES? TCPTCP

WHICH ONE USES A THREE WAY WHICH ONE USES A THREE WAY HANDSHAKE AND SEQUENCE HANDSHAKE AND SEQUENCE NUMBERS?NUMBERS? TCPTCP

CHAPTER 7CHAPTER 7

WHAT IS DNS USED FOR?WHAT IS DNS USED FOR? TO RESOLVE HUMAN READABLE TO RESOLVE HUMAN READABLE

DOMAIN NAMES TO NUMERIC IP DOMAIN NAMES TO NUMERIC IP ADDRESSESADDRESSES

IT ALSO REPLACES THE STATIC IT ALSO REPLACES THE STATIC HOSTS FILE WITH A MORE HOSTS FILE WITH A MORE PRACTICAL DYNAMIC SYSTEM PRACTICAL DYNAMIC SYSTEM

WHAT IS THE DIFFERENCE WHAT IS THE DIFFERENCE BETWEEN HTTP AND HTTPS? BETWEEN HTTP AND HTTPS? HTTPS ISSECUREHTTPS ISSECURE

WHAT IS A CACHING ONLY DNS WHAT IS A CACHING ONLY DNS SERVERSERVER ONE THAT RESOLVES MOST ONE THAT RESOLVES MOST

QUERIES MORE RAPIDLYQUERIES MORE RAPIDLY

CHAPTER 7CHAPTER 7 HOW MANY CONNECTIONS NEED TO HOW MANY CONNECTIONS NEED TO

EXIST BEWTEEN THE CLIENT AND EXIST BEWTEEN THE CLIENT AND SERVER TO TRANSFER FILES USING SERVER TO TRANSFER FILES USING FTP?FTP? 2 ONE FOR DATA ONE FOR CONTROL 2 ONE FOR DATA ONE FOR CONTROL

INFORMATION INFORMATION WHEN SENDING INFORMATION TO AN IP WHEN SENDING INFORMATION TO AN IP

ADDRESS, WHAT DOES THE NUMBER ADDRESS, WHAT DOES THE NUMBER AFTER THE COLON INDICATE IN THE AFTER THE COLON INDICATE IN THE EXAMPLE? EXAMPLE?

192.168.17.43:8547, 172.16.62.240:80192.168.17.43:8547, 172.16.62.240:80 THE PORT NUMBER THAT IS BEING USEDTHE PORT NUMBER THAT IS BEING USED

WHAT IS REVERSE LOOKUP DNS ZONE?WHAT IS REVERSE LOOKUP DNS ZONE? IT RESOLVES AN IP ADDRESS TO A FULLY IT RESOLVES AN IP ADDRESS TO A FULLY

QUALIFIED DOMAIN NAMEQUALIFIED DOMAIN NAME IS UDP FASTER THAN TCP?IS UDP FASTER THAN TCP?

YES IT IS, BECAUSE IT DOESN’T HAVE TO YES IT IS, BECAUSE IT DOESN’T HAVE TO RETRANSMITRETRANSMIT

CHAPTER 8CHAPTER 8

WHAT DOES “PRINCIPLE OF WHAT DOES “PRINCIPLE OF LEAST PRIVILEGE” MEAN?LEAST PRIVILEGE” MEAN? ONLY GIVE ACCESS TO THE ONLY GIVE ACCESS TO THE

RESOURCES THAT ARE RESOURCES THAT ARE NECESSARY FOR THEIR JOB NECESSARY FOR THEIR JOB

WHAT IS THE MAIN GOAL OF WHAT IS THE MAIN GOAL OF AAA’S THREE STEP PROCESS? AAA’S THREE STEP PROCESS? TO PREVENT UNAUTHORIZED TO PREVENT UNAUTHORIZED

ACCESS TO A NETWORKACCESS TO A NETWORK HOW IS IPS DIFFERENT FROM HOW IS IPS DIFFERENT FROM

IDS?IDS? IDS JUST NOTIFIES THERE MIGHT IDS JUST NOTIFIES THERE MIGHT

BE A PROBLEM, IPS STOPS IT FROM BE A PROBLEM, IPS STOPS IT FROM ENTERING INSIDE THE NETWORKENTERING INSIDE THE NETWORK

CHAPTER 8CHAPTER 8

WHAT IS A NORMAL BACK UP?WHAT IS A NORMAL BACK UP? BACKS UP EVERYTHING, WHETHER BACKS UP EVERYTHING, WHETHER

IT CHANGED OR NOT IT CHANGED OR NOT WHAT IS INCREMENTAL BACKUP? WHAT IS INCREMENTAL BACKUP?

BACKS UP ONLY THINGS THAT BACKS UP ONLY THINGS THAT HAVE CHANGED THAT DAY…HAVE CHANGED THAT DAY…REQUIRES THE LONGEST RESTOREREQUIRES THE LONGEST RESTORE

WHAT IS DIFFERENTAL BACKUP?WHAT IS DIFFERENTAL BACKUP? COPIES ONLY THINGS THAT HAVE COPIES ONLY THINGS THAT HAVE

CHANGED SINCE THE LAST BACKUPCHANGED SINCE THE LAST BACKUP

CHAPTER 9CHAPTER 9

IF YOU SUSPECT A NIC IF YOU SUSPECT A NIC MIGHT BE THE SOURCE OF MIGHT BE THE SOURCE OF THE PROBLEM, WHAT LAYER THE PROBLEM, WHAT LAYER IS THIS?IS THIS? LAYER 2LAYER 2