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CCNA - 2

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What does the IEEE 802.2 standard represent in Ethernet technologies?
UDP
Router
A. perform degradation b. security issues c. host identification
Logical Link Control sublayer

2. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
It has expanded adressing capabilities.
A. media sharing b. logical topology
Minimal delays in data delivery.

3. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network address
A. HTTP b. HTTPS
A. performance degradation b. security issues c. host identification

4. When do changes take effect in a Cisco router?
Physical
A. HTTP b. HTTPS
As the commands are entered.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

5. To make a console connection from a comp to a Cisco router - what cable should be used?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Rollover cable
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate

6. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Router(config)# interface FastEthernet 0/1
Originate data flow.
Minimal delays in data delivery.

7. There are too many broadcasts on switches - what can be done?
Binary ANDing
A. replace a switch w/ a router b. subnet the new networks
Create signals that represent the bits in each frame for the media.
SSH

8. What type of network cable is used between a terminal and a console port?
Rollover cable
A. next-hop b. metric/interface c. destination network address
Collisions can decrease network performance.
Next-Hop Address

9. What is the primary reason for developing IPv6?
It provides for the exchange of data over a common local media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
UTP
It has expanded adressing capabilities.

10. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Network Media Control
A. hot keys b. context-sensitive c. command syntax check
Network address

11. What do the intermediary devices in the network do?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
Twisting of the cables

12. An admin needs to keep contents private - which access method should he use?
255.255.255.0
Collisions can decrease network performance.
SSH
Fiber

13. What can you identify when you examine the Network Layer header?
A. low overhead b. connectionless
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Logical Link Control sublayer
The destination host address.

14. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
SSH
A. Cat5 UTP b. Cat6 UTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

15. What makes fiber preferable to copper for interconnecting buildings?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. media sharing b. logical topology
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
They must wait until the first hosts finish transfering the media.

16. How does the application layer on a server process multiple client requests for services?
A backbone cable.
It provides interface between applications on either end of the network.
It uses support from the lower layers to distinguish between connections to the service.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

17. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
Source and Destination IP address
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
8
A. servers b. routers c. network printers

18. 3 common problems w/ a large network
Network Media Control
SSH
A. performance degradation b. security issues c. host identification
Twisting of the cables

19. What is a protocol that provides connectionless network layer services?
A. netstat -r b. route PRINT
It has expanded adressing capabilities.
IP Protocol
Hub

20. What is the function of the DLL?
It provides for the exchange of data over a common local media.
A. Physical b. Data Link
To prevent the receiver from being overwhelmed by incoming data.
Signal loss can be experienced.

21. What are 2 forms of application layer software?
A backbone cable.
A. application b. services
A. purpose b. geographic location c. ownership
A random delay helps prevent the stations from experiencing another collision during transmission.

22. What application layer protocol is used to support file transfers between client and server?
FTP
A backbone cable.
A. router b. firewall
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

23. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
IP Protocol
Originate data flow.
Any device whose backoff timer expires first.

24. What info is found in the TCP and UDP header info?
Rollover cable
Source and Destination Ports
172.16.192.160
The destination host address.

25. Why are port numbers included in the TCP header of a segment?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
To enable a receiving host to forward the data to the appropriate application.
A. show startup-config b. show running-config

26. What is dinamically selected by the source host when forwarding data?
Source Port
Logical Link Control sublayer
UTP
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate

27. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Destination Network Address
A. application b. presentation c. session d. transmision e. network f. data link g. physical
The address of the router that the host will use to 'get to the other side'.

28. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. HTTP b. HTTPS
Create signals that represent the bits in each frame for the media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

29. What are 2 common characteristics associated w/ dynamic routing protocols?
A. Cat5 UTP b. Cat6 UTP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
255.255.255.0
A. perform degradation b. security issues c. host identification

30. 3 measures of data transfer
Source Port
A. goodput b. throughput c. bandwidth
Collisions can decrease network performance.
A. netstat -r b. route PRINT

31. What is a component of a routing table entry?
Next-Hop Address
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
A. perform degradation b. security issues c. host identification

32. What method of signal transmission uses radio waves to carry signals?
Console interface
Wireless
2046
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

33. What are the advantages of using a client-server model?
A default gateway (router).
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate
A. it has centralized administration b. security is easier to enforce
255.255.255.0

34. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. show startup-config b. show running-config
A. Cat5 UTP b. Cat6 UTP
Window Size
Signal loss can be experienced.

35. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A random delay helps prevent the stations from experiencing another collision during transmission.
It uses lasers as the light source.
A. minimizing of collisions b. division into broadcast domains
Hosts return to listen-before-transmit mode.

36. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A. perform degradation b. security issues c. host identification
DNS
Fiber

37. What networking devices are recommended to be assigned static IP addresses?
Host mobility
A. servers b. routers c. network printers
A. addressing b. error detection c. frame delimiting
Signal loss can be experienced.

38. 2 functions of encapsulation
Signal loss can be experienced.
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
Is a layer of specific encapsulation.
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device

39. What can get you to an outside network?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A default gateway (router).
0 to 1023
Destination Network Address

40. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. HTTP b. HTTPS
Binary ANDing

41. What is the primary purpose of Layer 4?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
0 to 1023
Signal loss can be experienced.
Identify processes or services that are communicating with end devices.

42. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
255.255.255.0
Source and Destination IP address
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

43. What command is used to change the default name to 'Costas'?
Time-to-live (TTL)
Router(config)# hostname Costas
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Rollover cable

44. Which type of cable is most often associated w/ fiber-optic cable?
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate
A backbone cable.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. they initiate data exchanges b. they may upload data to servers

45. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
Network Layer
A. they initiate data exchanges b. they may upload data to servers
Router(config)# hostname Costas

46. What kind of problems are caused by excessive broadcast traffic on network segments?
A. application b. services
A. DB 60 b. Winchester 15-pin c. smart serial
Console interface
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

47. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
0 to 1023
Next-Hop Address
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

48. Intermediary devices used to implement security between networks
They must wait until the first hosts finish transfering the media.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
A. router b. firewall

49. What device can check for faults - integrity and performance of media?
A. Physical b. Data Link
OTDR
A. it has centralized administration b. security is easier to enforce
A. media sharing b. logical topology

50. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. purpose b. geographic location c. ownership
A. netstat -r b. route PRINT
Switch
255.255.255.224

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CCNA - 2

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