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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 application layer protocol is used to support file transfers between client and server?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. the router will discard the packet b. the router will send a time exceeded message to the source host
FTP
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks

2. What is a benefit of a WAN?
Signal loss can be experienced.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. low overhead b. connectionless
Host mobility

3. After an ethernet collision - which device has priority to transmit data?
It provides interface between applications on either end of the network.
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
Switch
Any device whose backoff timer expires first.

4. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
80 (HTTP)
The magnetic field around the adjacent pairs of wire.
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

5. What is a drawback of the CSMA/CD access method?
Network
A. non-deterministic b. less overhead c. collisions exist
A physical topology.
Collisions can decrease network performance.

6. What are 2 commands used to view a host routing table?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Rollover cable
A. netstat -r b. route PRINT
Destination is not contacted before a packet is sent.

7. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
A default gateway (router).
A. DNS b. SMTP c. POP
Show Interfaces

8. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
A default gateway (router).
A. show startup-config b. show running-config
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. DB 60 b. Winchester 15-pin c. smart serial

9. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
2046
Router
Logical Link Control sublayer

10. 3 measures of data transfer
0 to 1023
A. goodput b. throughput c. bandwidth
FTP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

11. What are 3 properties of contention-based media access for a shared media?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Console
A. non-deterministic b. less overhead c. collisions exist
A. physical layer b. DLL layer

12. During a TCP session - if packets arrive out of order - what will happen?
A. HTTP b. HTTPS
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The packets will be delivered and reassembled at destination.
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks

13. Group of hosts that have identical bit patterns in the high order bits of their addresses
UDP
Is a layer of specific encapsulation.
Network
A. DNS b. SMTP c. POP

14. 3 primary functions of the data link layer encapsulation
A. Cat5 UTP b. Cat6 UTP
A. addressing b. error detection c. frame delimiting
It uses support from the lower layers to distinguish between connections to the service.
A random delay helps prevent the stations from experiencing another collision during transmission.

15. What is the role of MTA in handling email?
The physical address is added.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The MAC protocol can be very simple.
A. minimizing of collisions b. division into broadcast domains

16. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
Host A
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

17. If you have a full-duplex operational network - what can happen?
A. it has centralized administration b. security is easier to enforce
No collisions will occur on this link.
Minimal delays in data delivery.
A random delay helps prevent the stations from experiencing another collision during transmission.

18. 3 statements of media acess control
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. non-deterministic b. less overhead c. collisions exist
A. perform degradation b. security issues c. host identification
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media

19. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Network address
255.255.255.224
Network Layer Packet

20. What is the function of the DLL?
Binary ANDing
A. MTA b. SMTP
Source Port
It provides for the exchange of data over a common local media.

21. Default Gateway is incorrect on the host - What is the impact on the communications?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It provides interface between applications on either end of the network.
Destination is not contacted before a packet is sent.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

22. What characteristic of an UTP helps reduce interference?
255.255.255.224
Twisting of the cables
255.255.255.0
A. physical layer b. DLL layer

23. What are 3 common problems w/ large networks?
As the commands are entered.
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Media Control
A. perform degradation b. security issues c. host identification

24. Which IP packet field will prevent endless loops?
Identify the device that allows local network computers to communicate w/ devices in other networks.
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
Time-to-live (TTL)
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

25. An admin needs to keep contents private - which access method should he use?
A. next-hop b. metric/interface c. destination network address
Console
A. flow control b. session establishment c. numbering and sequencing
SSH

26. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Router
UTP

27. What correctly describes a MAC address?
Network portion
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. show startup-config b. show running-config
A. router b. firewall

28. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. hot keys b. context-sensitive c. command syntax check
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

29. Which device is used to create or divide broadcast domains?
When connecting a host to a switch.
A. servers b. routers c. network printers
A. show startup-config b. show running-config
Router

30. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. perform degradation b. security issues c. host identification
32 bits
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

31. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
UDP
It uses lasers as the light source.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

32. What is the primary purpose of ARP?
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
A. goodput b. throughput c. bandwidth
Resolve IPv4 addresses to MAC addresses.
A. media sharing b. logical topology

33. Statements that describe LAN
A. minimizing of collisions b. division into broadcast domains
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks

34. What can be a problem that is reduced by adding end-to-end addressing?
Application Layer
It reduces unnecessary broadcasts.
FTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

35. What do the intermediary devices in the network do?
172.16.192.160
The physical address is added.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The destination host address.

36. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
2046
Ctrl + Shift + 6
A. DB 60 b. Winchester 15-pin c. smart serial
SSH

37. What 2 type of cables would most commonly be used for new runs?
No collisions will occur on this link.
SMB
When connecting a host to a switch.
A. Cat5 UTP b. Cat6 UTP

38. At which layers of the OSI model does ethernet operate?
The magnetic field around the adjacent pairs of wire.
A. physical layer b. DLL layer
Console
Logical Link Control sublayer

39. 2 most commonly used media types in ethernet networks
UTP
A. application b. services
A. copper UTP b. optical fiber
A. media sharing b. logical topology

40. What is the purpose of a default gateway?
It does not support encryption.
It uses support from the lower layers to distinguish between connections to the service.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Hosts return to listen-before-transmit mode.

41. What networking devices are recommended to be assigned static IP addresses?
Network Access
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
A. servers b. routers c. network printers
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

42. When is a straight-through cable used in a network?
A. replace a switch w/ a router b. subnet the new networks
When connecting a host to a switch.
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
32 bits

43. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Show Interfaces
A. Physical b. Data Link
Source and Destination IP address

44. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Collisions can decrease network performance.
Switch
Router

45. When do changes take effect in a Cisco router?
Network
Destination is not contacted before a packet is sent.
As the commands are entered.
A. show startup-config b. show running-config

46. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
FTP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Supports error detection.

47. What is the primary purpose of Layer 4?
Source Port
A. Cat5 UTP b. Cat6 UTP
Network Layer
Identify processes or services that are communicating with end devices.

48. Which 2 options represent Layer 4 addressing?
Show Interfaces
Identify processes or services that are communicating with end devices.
A. non-deterministic b. less overhead c. collisions exist
A. identifies the communicating applications b. identifies multiple conversations between the hosts

49. What kind of problems are caused by excessive broadcast traffic on network segments?
Create signals that represent the bits in each frame for the media.
Host A
Resolve IPv4 addresses to MAC addresses.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

50. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Hub
A random delay helps prevent the stations from experiencing another collision during transmission.
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. MTA b. SMTP