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. Which portion of the network layer address does a router use to forward packets?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. hot keys b. context-sensitive c. command syntax check
Network portion

2. What command can be used to determine if the router has experienced any input or output errors?
The packets will be delivered and reassembled at destination.
172.16.192.160
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Show Interfaces

3. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
Host mobility
They must wait until the first hosts finish transfering the media.
A physical topology.

4. Which type of cable is most often associated w/ fiber-optic cable?
A. Physical b. Data Link
Router(config)# hostname Costas
A. enable mode b. priviledge executive mode
A backbone cable.

5. What is an automated service that matches resource names w/ required IP addresses?
Supports error detection.
A. larger address space b. data types and classes of service c. authentication and encryption
DNS
A. perform degradation b. security issues c. host identification

6. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. application b. services
Source Port
They must wait until the first hosts finish transfering the media.
Hub

7. What are key considering factors when grouping hosts into common networks?
Transport
Router(config)# interface FastEthernet 0/1
A. purpose b. geographic location c. ownership
A. decentralized resources b. resource sharing w/o a dedicated server

8. 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?
The packets will be delivered and reassembled at destination.
Host A
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
FTP

9. Which characteristics describe fiber optic cable?
Rollover cable
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The physical address is added.
IP is not properly installed

10. What 2 type of cables would most commonly be used for new runs?
Source and Destination Ports
A. Cat5 UTP b. Cat6 UTP
A. copper UTP b. optical fiber
A random delay helps prevent the stations from experiencing another collision during transmission.

11. Which device is used to create or divide broadcast domains?
A. application b. services
Host mobility
Router
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

12. In business LANs - which connector is used w/ twisted-pair networking cable?
Rollover cable
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
RJ-45
A. enable mode b. priviledge executive mode

13. What is a disadvantage of Telnet?
Source Port
A. Physical b. Data Link
A. DNS b. SMTP c. POP
It does not support encryption.

14. How many bits make up an IPv4 address?
The packets will be delivered and reassembled at destination.
Rollover cable
Supports error detection.
32 bits

15. When destination network is not in the routing table - What are 2 actions the router might take?
A. addressing b. error detection c. frame delimiting
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Signal loss can be experienced.
A physical topology.

16. There are too many broadcasts on switches - what can be done?
0 to 1023
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. replace a switch w/ a router b. subnet the new networks
32 bits

17. Why are port numbers included in the TCP header of a segment?
The address of the router that the host will use to 'get to the other side'.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
To enable a receiving host to forward the data to the appropriate application.
UTP

18. Which layer supplies services and allows user interface?
Application Layer
2046
IP Protocol
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

19. After an ethernet collision - which device has priority to transmit data?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Any device whose backoff timer expires first.
As the commands are entered.
Window Size

20. What is a drawback of the CSMA/CD access method?
A. perform degradation b. security issues c. host identification
A. DNS b. SMTP c. POP
Collisions can decrease network performance.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

21. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
Rollover cable
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
32 bits

22. What application layer protocol is used to support file transfers between client and server?
A. low overhead b. connectionless
FTP
Console
A. Cat5 UTP b. Cat6 UTP

23. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
172.16.192.160
UTP
A. next-hop b. metric/interface c. destination network address

24. What type of routing uses information that is manually entered into the routing table?
A. they initiate data exchanges b. they may upload data to servers
Router(config)# hostname Costas
Static
Resolve IPv4 addresses to MAC addresses.

25. 2 characteristics of clients in data networks
Network Access
A. they initiate data exchanges b. they may upload data to servers
Network address
The address of the router that the host will use to 'get to the other side'.

26. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Application Layer
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Binary ANDing
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

27. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Wireless
Hosts return to listen-before-transmit mode.
The MAC protocol can be very simple.
Is a layer of specific encapsulation.

28. What info is found in the TCP and UDP header info?
Destination is not contacted before a packet is sent.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Is used by the server to resolve names.
Source and Destination Ports

29. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
A. replace a switch w/ a router b. subnet the new networks
Next-Hop Address
The packets will be delivered and reassembled at destination.

30. What is the primary rope of the physical layer in transmitting data?
A. show startup-config b. show running-config
A. non-deterministic b. less overhead c. collisions exist
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Create signals that represent the bits in each frame for the media.

31. What causes crosstalk within cable pairs when using UTP?
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. 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. hot keys b. context-sensitive c. command syntax check
The magnetic field around the adjacent pairs of wire.

32. What device can check for faults - integrity and performance of media?
Network Layer Packet
Identify processes or services that are communicating with end devices.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
OTDR

33. What is the purpose of a default gateway?
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
Identify processes or services that are communicating with end devices.
RJ-45

34. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
No collisions will occur on this link.
2046
A. low overhead b. connectionless

35. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
A. flow control b. session establishment c. numbering and sequencing
Source Port
Time-to-live (TTL)

36. At which layers of the OSI model does ethernet operate?
80 (HTTP)
Create signals that represent the bits in each frame for the media.
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. physical layer b. DLL layer

37. If you have a full-duplex operational network - what can happen?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
No collisions will occur on this link.
IP is not properly installed
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

38. What is the proper order of the OSI Layers?
A. purpose b. geographic location c. ownership
Hub
255.255.255.224
A. application b. presentation c. session d. transmision e. network f. data link g. physical

39. What can be a problem that is reduced by adding end-to-end addressing?
A. flow control b. session establishment c. numbering and sequencing
It reduces unnecessary broadcasts.
Create signals that represent the bits in each frame for the media.
Identify processes or services that are communicating with end devices.

40. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
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
The destination host address.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

41. Statements that describe LAN
A default gateway (router).
A. low overhead b. connectionless
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Next-Hop Address

42. What makes fiber preferable to copper for interconnecting buildings?
Logical Link Control sublayer
Resolve IPv4 addresses to MAC addresses.
OTDR
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

43. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. flow control b. session establishment c. numbering and sequencing
Physical
Switch
0 to 1023

44. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Identify processes or services that are communicating with end devices.
Window Size
A. DNS b. SMTP c. POP
8

45. What is the primary function of encapsulating packets into frames?
The physical address is added.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. not affected by EMI of RFI b. most expensive type of LAN cabling
To facilitate the entry and exit of data on media.

46. What information is added during encapsulation at OSI Layer 3?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
It does not support encryption.
Source and Destination IP address
Static

47. When is a straight-through cable used in a network?
Logical Link Control sublayer
Show Interfaces
When connecting a host to a switch.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

48. What is the role of the OSI Application Layer?
Network
A. router b. firewall
It provides interface between applications on either end of the network.
Is used by the server to resolve names.

49. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. replace a switch w/ a router b. subnet the new networks
32 bits
A. not affected by EMI of RFI b. most expensive type of LAN cabling

50. 3 features of IPv6
0 to 1023
A. larger address space b. data types and classes of service c. authentication and encryption
Network
A. perform degradation b. security issues c. host identification