Test your basic knowledge |

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. Important characteristic of UDP
Minimal delays in data delivery.
Console
A. larger address space b. data types and classes of service c. authentication and encryption
Create signals that represent the bits in each frame for the media.

2. If you have a full-duplex operational network - what can happen?
Destination Network Address
A. router b. firewall
No collisions will occur on this link.
A default gateway (router).

3. Where is the IOS file stored at?
Flash
A. application b. services
A. MTA b. SMTP
Router

4. What application layer protocol is used to support file transfers between client and server?
It uses lasers as the light source.
Host A
FTP
Host mobility

5. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Rollover cable
Router(config)# hostname Costas
UDP
Collisions can decrease network performance.

6. What are key considering factors when grouping hosts into common networks?
Router(config)# hostname Costas
A. purpose b. geographic location c. ownership
SSH
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

7. Which type of cable is most often associated w/ fiber-optic cable?
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 backbone cable.
The magnetic field around the adjacent pairs of wire.
Identify processes or services that are communicating with end devices.

8. Which device is used to create or divide broadcast domains?
Router
Router(config)# interface FastEthernet 0/1
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
RJ-45

9. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
It uses lasers as the light source.
Source and Destination Ports
A. media sharing b. logical topology

10. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. purpose b. geographic location c. ownership
Console
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

11. 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?
Show Interfaces
To prevent the receiver from being overwhelmed by incoming data.
A. show startup-config b. show running-config
Supports error detection.

12. 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
255.255.255.224
A backbone cable.
Identify the device that allows local network computers to communicate w/ devices in other networks.

13. Why are port numbers included in the TCP header of a segment?
A. purpose b. geographic location c. ownership
To enable a receiving host to forward the data to the appropriate application.
A. it has centralized administration b. security is easier to enforce
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

14. What are 3 properties of contention-based media access for a shared media?
A physical topology.
A. non-deterministic b. less overhead c. collisions exist
32 bits
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

15. What are 2 protocols for transfering web resources?
Logical Link Control sublayer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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

16. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Source Port
A backbone cable.
Collisions can decrease network performance.

17. What is dinamically selected by the source host when forwarding data?
Source Port
FTP
No collisions will occur on this link.
A physical topology.

18. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To facilitate the entry and exit of data on media.

19. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
To facilitate the entry and exit of data on media.
A. purpose b. geographic location c. ownership
Hosts return to listen-before-transmit mode.

20. What layer encapsulates segments into packets?
IP Protocol
A. netstat -r b. route PRINT
Network Layer
172.16.192.160

21. 3 common problems w/ a large network
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. performance degradation b. security issues c. host identification
UTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

22. 3 terms that define the forms of help available within the Cisco IOS
A. Physical b. Data Link
A. hot keys b. context-sensitive c. command syntax check
Wireless
A. application b. services

23. 3 statements of media acess control
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
A. next-hop b. metric/interface c. destination network address
Router(config)# interface FastEthernet 0/1
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

24. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
UDP
0 to 1023
A. goodput b. throughput c. bandwidth
A. physical layer b. DLL layer

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

26. What info is found in the TCP and UDP header info?
Source and Destination Ports
A. router b. firewall
To enable a receiving host to forward the data to the appropriate application.
OTDR

27. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
32 bits
A backbone cable.

28. What is the primary reason for developing IPv6?
A. DB 60 b. Winchester 15-pin c. smart serial
When connecting a host to a switch.
A random delay helps prevent the stations from experiencing another collision during transmission.
It has expanded adressing capabilities.

29. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
255.255.255.0
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

30. What is the purpose of the preamble in an ethernet frame?
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
A. Physical b. Data Link
A backbone cable.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

31. What can you identify when you examine the Network Layer header?
32 bits
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
The destination host address.
172.16.192.160

32. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Network Layer Packet
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Hosts return to listen-before-transmit mode.
A. HTTP b. HTTPS

33. What is a default gateway address?

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34. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
255.255.255.0
A. next-hop b. metric/interface c. destination network address
When connecting a host to a switch.

35. What is a drawback of the CSMA/CD access method?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Collisions can decrease network performance.
Logical Link Control sublayer
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

36. What is the primary function of encapsulating packets into frames?
2046
A. MTA b. SMTP
To facilitate the entry and exit of data on media.
A. goodput b. throughput c. bandwidth

37. 3 functions of the upper data link sublayer in the OSI model
When connecting a host to a switch.
UTP
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
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

38. What is the primary purpose of ARP?
Source Port
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
8
Resolve IPv4 addresses to MAC addresses.

39. What type of routing uses information that is manually entered into the routing table?
A. application b. services
2046
Network Layer
Static

40. 3 properties of peer-2-peer applications
Signal loss can be experienced.
Console
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
IP is not properly installed

41. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
A. goodput b. throughput c. bandwidth
To enable a receiving host to forward the data to the appropriate application.
A. copper UTP b. optical fiber

42. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Source Port
8
Supports error detection.
A. enable mode b. priviledge executive mode

43. 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. hot keys b. context-sensitive c. command syntax check
RJ-45
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

44. What do the intermediary devices in the network do?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Switch
A. next-hop b. metric/interface c. destination network address
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

45. Which characteristics describe fiber optic cable?
A. decentralized resources b. resource sharing w/o a dedicated server
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. not affected by EMI of RFI b. most expensive type of LAN cabling
To enable a receiving host to forward the data to the appropriate application.

46. 3 facts about the network portion of an IPv4 address
255.255.255.0
A. replace a switch w/ a router b. subnet the new networks
Show Interfaces
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

47. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
IP is not properly installed
A. application b. services
A. identifies the communicating applications b. identifies multiple conversations between the hosts

48. What are 2 email components used to forward mail between servers?
A. hot keys b. context-sensitive c. command syntax check
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. MTA b. SMTP
RJ-45

49. Which 2 options represent Layer 4 addressing?
A. they initiate data exchanges b. they may upload data to servers
A. media sharing b. logical topology
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It uses lasers as the light source.

50. 2 features that make switches preferable to hubs
Destination Network Address
Hub
A. minimizing of collisions b. division into broadcast domains
A physical topology.