Transcript Semester 4 final exam REVIEW

Semester 2 final exam
REVIEW
2011
CHAPTER 1

What is the speed of a T1 line?
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What layer does PING test?
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Layer 3
What does PING send?
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1.544 Mbps
AN ECHO REQUEST
What does the time show when you
issue a PING?

THE TIME BETWEEN WHEN PACKET
IS SENT AND RECEIVED
CHAPTER 1
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PC1 pings the IP address of PC2.
What does PC1 send by doing the
PING?
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PC2 responds to PC1 with what?
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An echo request message
An echo reply message
What is the difference between PING
and TRACERT?

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Ping shows a reply from the device
Tracert shows the path it too
CHAPTER 1
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What does the word “scalable”
mean?
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The ability to grow
What things are at Layer 1?

Hubs, transcievers, cables,
waves, electrical issue
CHAPTER 2

What kind of cable is used to
connect a switch to a switch?
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What kind of cable is used to
connect a switch to a hub?
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A crossover
What kind of cable is used to
connect a switch to a router?
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A crossover
A straight through
What kind of cable is used to
connect a computer directly to a to a
router’s ethernet port?
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A crossover
CHAPTER 2

What kind of cable is used to
connect a hub to a hub?

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What kind of cable is used to
connect a switch to a pc’s ethernet
port?
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A crossover
A straight through
What kind of cable is used to
connect a computer’s comport a
router in order to configure the
router?
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A rollover (console cable)
CHAPTER 2

You have a problem with a NIC.
What layer is this?

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Which layer has to do with
Firewalls?
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Layer 2
Layer 4
If you can HTTP to a site but
you can’t FTP to the same site,
what might be the problem?

A misconfigured firewall
CHAPTER 2

A customer calls and says they have
a blank screen. What do you ask
him?
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
Which level ISP help desk support
would normally answer that
problem?
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Is your computer plugged in/turned on
Level 1
Why do we use the OSI model?

It divides networking communications
into multiple processes that are smaller
and more manageable
CHAPTER 2

You are using a top-down
troubleshooting approach to find
problems. You assume it starts at
what level?


What would you ask the customer to
check first?

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Layer 7 (application)
Can they get to a website?
A user can ping a host by IP address
but not Domain name. What might
be the problem?

DNS
CHAPTER 2
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What are POP3 and SMTP?


Sending out a technician to the site
to solve a problem that couldn’t be
solved over the phone is a job of
what level of ISP support personnel?


Email protocols
Level 3
After going out to solve that problem,
what should you do afterwards?


Obtain acceptance fo the customer
Document the solution
CHAPTER 3

STP and UTP will travel how many
feet?


What kind of cable do you need to
used as a backbone between floors
and greater and 500 meters?

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328 feet or 100 meters
Fiber optic
What kind of cable should be used
between an MDF and an IDF?
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FIBER OPTIC
CHAPTER 3
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What is the cabling called going
from the wall jack to a patch
panel in a wiring closet?

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Horizontal cable
You have been put in charge of
designing a new structured
cabling system for a company.
What should you obtain first?
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An accurate floorplan
CHAPTER 4
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What is NAT and what does it do?
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What is PAT?
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Port Address Translation
NAT overload
What is the difference between the two?
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Network Address Translation
It hides your address from the rest of the world
by using a private address inside the network
PAT allows you to have multiple computers
using the same address on the outside world
We learned about Static and Dynamic
NAT. On what devices should you use
Static Nat?

File servers that need accessed from the outside
world
CHAPTER 4

What subnet mask will give you 62
computers in your network?
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With the subnet mask 255.255.255.224,
how many computers?
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255.255.255.192
26 = 64 but you lose two so 62 computers
25 = 32 but you lose two so 30 computers
What subnet mask is /27?
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255.255.255.224
25 = 32 meaning every subnet starts with a
multiple of 32
192.168.65.0
192.168.65.32
192.168.65.64
192.168.65.96 etc
CHAPTER 4
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If you have a subnet mask of
255.255.254.0 how many computers
do you have in subnetwork?
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With the above example, how many
subnetworks will you have?
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29 = 512 but you lose two so 510
computers
27 = 128 subnetworks
Why would you get the message BAD
MASK FOR ADDRESS 10.14.14.63

YOU GET THIS MESSAGE WHEN YOU
TRY TO PUT A BROADCAST ADDRESS
ON A INTERFACE
CHAPTER 5
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WHAT IS AN SSID?
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
WHY SHOULD YOU BROADCAST THE
SSID?
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SO YOUR USERS CAN FIND IT
WHY WOULD YOU NOT BROADCAST
THE SSID?
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THE WIRELESS NETWORK THAT YOU ARE
USING
WHEN YOU DON’T WANT USERS ON IT
WHY SHOULD YOU DO A WIRELESS
SURVEY BEFORE YOU DEPLOY A NEW
NETWORK?
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IT WILL FIND THE OPTIMAL NUMBER AND
PLACEMENT OF ACCESS POINTS
CHAPTER 5
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WHY IS DHCP USED?
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WHY WOULD YOU USE SERVICE
PASSWORD-ENCRYPTION?
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TO ENCRYPT THE CONSOLE ACCESS
PASSWORD
DOE THE BANNER LOGIN COME AFTER
THE MOTD (MESSAGE OF THE DAY) OR
BEFORE?
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IT IS A SIMPLE WAY TOGET IP ADDRESSES
TO HOSTS
AFTER MOTD…BUT BEFORE THE LOGIN
CREDENTIALS
WHAT DOES A DEFAULT ROUTE POINT
TO?
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THE NEXT HOP ROUTER ON THE PATH
CHAPTER 5

WHAT DOES THIS COMMAND DO?
R1(config)#ip route 0.0.0.0 0.0.0.0 192.168.0.2
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WHAT COMMAND DO YOU NEED
TO ENTER TO ENABLE AN
INTERFACE?
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CREATES A DEFAULT ROUTE on R1
NO SHUTDOWN
DO YOU HAVE TO HAVE A
DESCRIPTION ON AN INTERFACE
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NO----IT IS OPTIONAL
CHAPTER 5
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WHAT DOES ^ MEAN?
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THE COPY TFTP RUNNINGCONFIG WILL COPY FROM
WHERE ?
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WHERE YOU HAVE A MISTAKE
A TFTP SERVER
WHERE DOES THAT SAME
COMMAND COPY TO?
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RAM
CHAPTER 5
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WHEN USING IP NEGOTIATED
WITH SDM, WHAT KIND OF
ENCAPSULATION SUPPORTS
AUTO IP ADDRESS
ASSIGNMENT?
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WHAT COLOR IS THE SYST LED
LIGHT WHEN IT FAILS POST ?
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PPP
AMBER
WHAT IS THE DEFAULT
ENCAPSULATION ON SERIAL
INTERFACES?
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HDLC
CHAPTER 5
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WHAT IS THE HOSTNAME COMMAND
USED FOR?

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IF YOU DO NOT HAVE THE COMMAND
NO SHUTDOWN ENTERED, WILL THE
INTERFACE BE ADMINISTRATIVELY UP
OR DOWN ?
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TO CHANGE THE NAME OF THE ROUTER
DOWN, BUT THE IP WILL SHOW UP
WHICH TYPE OF ROUTES ARE
AUTOMATICALLY UPDATED AND
MAINTAINED BY ROUTING
PROTOCOLS?
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DYNAMIC
CHAPTER 6
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WHAT DOES THE 120 MEAN IN
10.0.5.0[120/3] VIA 10.0.2.1, 00:00:10, SERIAL 0/2
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THE ADMINISTRATIVE DISTANCE
WHAT IS THE PURPOSE OF THE
ROUTING PROCESS?
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TO SELECT THE PATHS THAT ARE
USED TO DIRECT TRAFFIC TO
DESTINATION NETWORK
WHAT DOES 192.168.16.0 MEAN IN
THE FOLLOWING
R1(CONFIG)#IP ROUTE 192.168.16.0 255.255.255.0 192.168.15.1?
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THE DESTINATION YOU ARE TRYING
TO GET TO
CHAPTER 6
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WHICH TYPE OF ROUTING PROTOCAL
DEPENDS ON THE DUAL ALGORITHM
TO CALCULATE THE SHORTEST PATH?
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WILL EIGRP USE HOPS TO MAKE ITS
DECISION ON WHICH ROUTE TO TAKE?
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EIGRP
NO…IT MIGHT GO THROUGH MORE
ROUTERS, IF THE PATH IS ACTUALLY
FASTER
WHAT DOES EGP STAND FOR AND
WHAT DOES IT DO?
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EXTERIOR GATEWAY PROTOCOL AND IT
ROUTES BETWEEN DIFFERENT
AUTONOMOUS SYSTEMS
AN EXAMPLE WOULD BE BGP
CHAPTER 6
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WHAT DOES AN R SIGNIFY IN A
SHOW IP ROUTE?
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RIP ROUTING IS USED
WHAT DOES THE SERIAL 0/0/0
MEAN IN THE FOLLOWING?
192.168.4.0/24 [120/1] via
192.168.3.2, 00:00:19, serial 0/0/0
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THE ROUTER INTERFACE THAT
192.168.4.0 WILL SEND TO
CHAPTER 7
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WE LEARNED ABOUT UDP AND TCP.
WHICH ONE IS CONSIDERED TO BE
CONNETIONLESS?
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WHICH ONE USES MORE OVERHEAD?
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TCP
WHICH ONE RETRANSMITS LOST
PACKAGES?
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UDP
TCP
WHICH ONE USES A THREE WAY
HANDSHAKE AND SEQUENCE
NUMBERS?
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TCP
CHAPTER 7
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WHAT IS DNS USED FOR?
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WHAT IS THE DIFFERENCE
BETWEEN HTTP AND HTTPS?
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TO RESOLVE HUMAN READABLE
DOMAIN NAMES TO NUMERIC IP
ADDRESSES
IT ALSO REPLACES THE STATIC
HOSTS FILE WITH A MORE
PRACTICAL DYNAMIC SYSTEM
HTTPS ISSECURE
WHAT IS A CACHING ONLY DNS
SERVER
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ONE THAT RESOLVES MOST
QUERIES MORE RAPIDLY
CHAPTER 7
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HOW MANY CONNECTIONS NEED TO
EXIST BEWTEEN THE CLIENT AND
SERVER TO TRANSFER FILES USING
FTP?
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2 ONE FOR DATA ONE FOR CONTROL
INFORMATION
WHEN SENDING INFORMATION TO AN IP
ADDRESS, WHAT DOES THE NUMBER
AFTER THE COLON INDICATE IN THE
EXAMPLE?
192.168.17.43:8547, 172.16.62.240:80
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WHAT IS REVERSE LOOKUP DNS ZONE?
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THE PORT NUMBER THAT IS BEING USED
IT RESOLVES AN IP ADDRESS TO A FULLY
QUALIFIED DOMAIN NAME
IS UDP FASTER THAN TCP?
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YES IT IS, BECAUSE IT DOESN’T HAVE TO
RETRANSMIT
CHAPTER 8
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WHAT DOES “PRINCIPLE OF
LEAST PRIVILEGE” MEAN?
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WHAT IS THE MAIN GOAL OF
AAA’S THREE STEP PROCESS?

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ONLY GIVE ACCESS TO THE
RESOURCES THAT ARE
NECESSARY FOR THEIR JOB
TO PREVENT UNAUTHORIZED
ACCESS TO A NETWORK
HOW IS IPS DIFFERENT FROM
IDS?
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IDS JUST NOTIFIES THERE MIGHT
BE A PROBLEM, IPS STOPS IT FROM
ENTERING INSIDE THE NETWORK
CHAPTER 8
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WHAT IS A NORMAL BACK UP?

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WHAT IS INCREMENTAL
BACKUP?
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BACKS UP EVERYTHING, WHETHER
IT CHANGED OR NOT
BACKS UP ONLY THINGS THAT
HAVE CHANGED THAT
DAY…REQUIRES THE LONGEST
RESTORE
WHAT IS DIFFERENTAL BACKUP?
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COPIES ONLY THINGS THAT HAVE
CHANGED SINCE THE LAST BACKUP
CHAPTER 9

IF YOU SUSPECT A NIC
MIGHT BE THE SOURCE OF
THE PROBLEM, WHAT LAYER
IS THIS?

LAYER 2