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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 command is used to change the default name to 'Costas'?
A. non-deterministic b. less overhead c. collisions exist
It reduces unnecessary broadcasts.
Router(config)# hostname Costas
Source and Destination IP address

2. 3 statements about routes and their use
Rollover cable
A. Physical b. Data Link
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
The magnetic field around the adjacent pairs of wire.

3. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
A. goodput b. throughput c. bandwidth
The physical address is added.
They must wait until the first hosts finish transfering the media.

4. Default Gateway is incorrect on the host - What is the impact on the communications?
80 (HTTP)
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. Cat5 UTP b. Cat6 UTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

5. 3 properties of peer-2-peer applications
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
0 to 1023
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network portion

6. 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
A. copper UTP b. optical fiber
Show Interfaces
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

7. 2 functions of encapsulation
A. HTTP b. HTTPS
A. purpose b. geographic location c. ownership
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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device

8. What do you need to use for an initial configuration on a Cisco router?
Router
A default gateway (router).
A. HTTP b. HTTPS
Console interface

9. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Identify the device that allows local network computers to communicate w/ devices in other networks.

10. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. Physical b. Data Link
The physical address is added.
UTP
TCP initializes the sequence numbers for the sessions.

11. Which layer supplies services and allows user interface?
They must wait until the first hosts finish transfering the media.
Twisting of the cables
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
Application Layer

12. After an ethernet collision - which device has priority to transmit data?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Any device whose backoff timer expires first.
255.255.255.224

13. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Ctrl + Shift + 6
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Is used by the server to resolve names.

14. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network Layer Packet
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Host A

15. Which 2 options represent Layer 4 addressing?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. servers b. routers c. network printers
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

16. Why is flow control used for TCP data transfer?
Ctrl + Shift + 6
A. non-deterministic b. less overhead c. collisions exist
To prevent the receiver from being overwhelmed by incoming data.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

17. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Host A
Host mobility
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

18. What info is found in the TCP and UDP header info?
IP is not properly installed
Time-to-live (TTL)
Source and Destination Ports
Transport

19. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
0 to 1023
A. servers b. routers c. network printers
It uses support from the lower layers to distinguish between connections to the service.
Network address

20. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
To enable a receiving host to forward the data to the appropriate application.
A. Cat5 UTP b. Cat6 UTP
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

21. When a network service fails - which port is most often used to access a router for management purposes?
Physical
Switch
Console
A physical topology.

22. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
It provides for the exchange of data over a common local media.
Logical Link Control sublayer
Hosts return to listen-before-transmit mode.

23. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. addressing b. error detection c. frame delimiting
Show Interfaces
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A physical topology.

24. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
UDP
A. DNS b. SMTP c. POP

25. What are 2 forms of application layer software?
Router(config)# hostname Costas
Application Layer
A. application b. services
It provides interface between applications on either end of the network.

26. What is the primary function of encapsulating packets into frames?
A. show startup-config b. show running-config
A. minimizing of collisions b. division into broadcast domains
A. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
To facilitate the entry and exit of data on media.

27. 2 most commonly used media types in ethernet networks
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. copper UTP b. optical fiber
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

28. Which characteristics describe fiber optic cable?
No collisions will occur on this link.
Console
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Access

29. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
SMB
Minimal delays in data delivery.
Switch

30. When destination network is not in the routing table - What are 2 actions the router might take?
It does not support encryption.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
MAC
A. they initiate data exchanges b. they may upload data to servers

31. What is dinamically selected by the source host when forwarding data?
Source Port
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network portion
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 function of the DLL?
It has expanded adressing capabilities.
It provides for the exchange of data over a common local media.
80 (HTTP)
Router(config)# hostname Costas

33. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. netstat -r b. route PRINT
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
The physical address is added.
UDP

34. What is a benefit of a WAN?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Host mobility
A. next-hop b. metric/interface c. destination network address
A. minimizing of collisions b. division into broadcast domains

35. What characteristic of an UTP helps reduce interference?
A. DNS b. SMTP c. POP
Twisting of the cables
A. larger address space b. data types and classes of service c. authentication and encryption
Flash

36. How does the application layer on a server process multiple client requests for services?
A. MTA b. SMTP
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
It uses support from the lower layers to distinguish between connections to the service.
IP is not properly installed

37. What are the advantages of using a client-server model?
Network portion
Console
Destination Network Address
A. it has centralized administration b. security is easier to enforce

38. What is a component of a routing table entry?
It provides interface between applications on either end of the network.
A. performance degradation b. security issues c. host identification
Identify the device that allows local network computers to communicate w/ devices in other networks.
Next-Hop Address

39. What makes fiber preferable to copper for interconnecting buildings?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. larger address space b. data types and classes of service c. authentication and encryption
The physical address is added.

40. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Next-Hop Address
A. router b. firewall
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. performance degradation b. security issues c. host identification

41. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
It reduces unnecessary broadcasts.
A random delay helps prevent the stations from experiencing another collision during transmission.
Next-Hop Address

42. What is the purpose of the TCP/IP Network Application Layer?
A. media sharing b. logical topology
A. copper UTP b. optical fiber
Collisions can decrease network performance.
Network Media Control

43. 3 features of IPv6
255.255.255.0
A. larger address space b. data types and classes of service c. authentication and encryption
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Flash

44. statements of IP adressing
A. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
RJ-45
Router(config)# hostname Costas
Destination is not contacted before a packet is sent.

45. At which layer of the TCP/IP model does ethernet operate?
A. show startup-config b. show running-config
OTDR
Network Access
It provides interface between applications on either end of the network.

46. What method of signal transmission uses radio waves to carry signals?
Wireless
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Router(config)# interface FastEthernet 0/1

47. What causes crosstalk within cable pairs when using UTP?
No collisions will occur on this link.
Source and Destination Ports
Network Media Control
The magnetic field around the adjacent pairs of wire.

48. What can get you to an outside network?
0 to 1023
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
IP Protocol
A default gateway (router).

49. What is a protocol that provides connectionless network layer services?
Originate data flow.
IP Protocol
Host A
A. HTTP b. HTTPS

50. When do changes take effect in a Cisco router?
MAC
Signal loss can be experienced.
As the commands are entered.
Identify processes or services that are communicating with end devices.