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. What is PDU?
A. flow control b. session establishment c. numbering and sequencing
Fiber
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Is a layer of specific encapsulation.

2. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.224
It provides for the exchange of data over a common local media.
255.255.255.0
Is used by the server to resolve names.

3. 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?
32 bits
8
MAC
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

4. What is the purpose of resource records in DNS?
The physical address is added.
FTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Is used by the server to resolve names.

5. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
UTP
Flash
A. larger address space b. data types and classes of service c. authentication and encryption

6. What is the function of the DLL?
A. minimizing of collisions b. division into broadcast domains
A. low overhead b. connectionless
A. goodput b. throughput c. bandwidth
It provides for the exchange of data over a common local media.

7. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
172.16.192.160
A. goodput b. throughput c. bandwidth
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

8. 2 characteristics of peer-2-peer
Flash
Originate data flow.
Logical Link Control sublayer
A. decentralized resources b. resource sharing w/o a dedicated server

9. 3 common problems w/ a large network
Router
A. performance degradation b. security issues c. host identification
A. copper UTP b. optical fiber
Network Media Control

10. 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?
Source and Destination IP address
They must wait until the first hosts finish transfering the media.
Network address
A. show startup-config b. show running-config

11. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
A. netstat -r b. route PRINT
A. DNS b. SMTP c. POP
To facilitate the entry and exit of data on media.

12. What is the purpose of the preamble in an ethernet frame?
Twisting of the cables
Network portion
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
No collisions will occur on this link.

13. What makes fiber preferable to copper for interconnecting buildings?
MAC
Twisting of the cables
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

14. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
8
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
SMB

15. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Console interface
Binary ANDing
A. application b. presentation c. session d. transmision e. network f. data link g. physical
The magnetic field around the adjacent pairs of wire.

16. 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
Signal loss can be experienced.
It has expanded adressing capabilities.
A. Physical b. Data Link

17. When a network service fails - which port is most often used to access a router for management purposes?
Router(config)# interface FastEthernet 0/1
A. it has centralized administration b. security is easier to enforce
Console
A. netstat -r b. route PRINT

18. What describes the purpose of default route?
A. DNS b. SMTP c. POP
Network Access
Next-Hop Address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

19. What do you need to use for an initial configuration on a Cisco router?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Console interface
80 (HTTP)

20. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It uses support from the lower layers to distinguish between connections to the service.
Show Interfaces

21. 3 measures of data transfer
They must wait until the first hosts finish transfering the media.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. goodput b. throughput c. bandwidth
Create signals that represent the bits in each frame for the media.

22. 3 statements about routes and their use
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
A. goodput b. throughput c. bandwidth
Show Interfaces

23. When destination network is not in the routing table - What are 2 actions the router might take?
When connecting a host to a switch.
A. goodput b. throughput c. bandwidth
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network address

24. What is a characteristic of a logical point-to-point topology?
Fiber
A. application b. services
Application Layer
The MAC protocol can be very simple.

25. Statements that describe LAN
The packets will be delivered and reassembled at destination.
Any device whose backoff timer expires first.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

26. What information is added during encapsulation at OSI Layer 3?
A. decentralized resources b. resource sharing w/o a dedicated server
FTP
A. copper UTP b. optical fiber
Source and Destination IP address

27. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
DNS
Create signals that represent the bits in each frame for the media.
A. performance degradation b. security issues c. host identification

28. What is a benefit of a WAN?
A. larger address space b. data types and classes of service c. authentication and encryption
Host mobility
A. they initiate data exchanges b. they may upload data to servers
Flash

29. What determines the method of media access control?
Binary ANDing
A. show startup-config b. show running-config
SMB
A. media sharing b. logical topology

30. What are 3 pieces of info about a route contained in a routing table?
The packets will be delivered and reassembled at destination.
Network Layer
Logical Link Control sublayer
A. next-hop b. metric/interface c. destination network address

31. What is a component of a routing table entry?
A default gateway (router).
A physical topology.
Next-Hop Address
Network Layer

32. What is a drawback of the CSMA/CD access method?
OTDR
Network Media Control
It provides for the exchange of data over a common local media.
Collisions can decrease network performance.

33. What characteristic of an UTP helps reduce interference?
Network Access
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Twisting of the cables
Time-to-live (TTL)

34. Which characteristics describe fiber optic cable?
Network address
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. non-deterministic b. less overhead c. collisions exist
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

35. 3 statements about the role of routers in the network
A. DNS b. SMTP c. POP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. router b. firewall
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

36. 3 functions of the upper data link sublayer in the OSI model
OTDR
A backbone cable.
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

37. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A default gateway (router).
Wireless
8

38. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
Ctrl + Shift + 6
UTP
8

39. What is a protocol that provides connectionless network layer services?
A. DNS b. SMTP c. POP
A. low overhead b. connectionless
IP Protocol
A random delay helps prevent the stations from experiencing another collision during transmission.

40. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
Network Media Control
A physical topology.
The magnetic field around the adjacent pairs of wire.

41. What is a default gateway address?

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42. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
Router
A. router b. firewall
Network

43. What device can check for faults - integrity and performance of media?
To facilitate the entry and exit of data on media.
The magnetic field around the adjacent pairs of wire.
A. MTA b. SMTP
OTDR

44. What are 2 features of User Diagram Protocol (UDP)?
A. it has centralized administration b. security is easier to enforce
A physical topology.
A. low overhead b. connectionless
Ctrl + Shift + 6

45. 3 characteristics of valid Ethernet Layer 2 addresses
Destination is not contacted before a packet is sent.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. copper UTP b. optical fiber
2046

46. How does the application layer on a server process multiple client requests for services?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Resolve IPv4 addresses to MAC addresses.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
It uses support from the lower layers to distinguish between connections to the service.

47. What does the IEEE 802.2 standard represent in Ethernet technologies?
IP is not properly installed
Logical Link Control sublayer
They must wait until the first hosts finish transfering the media.
The destination host address.

48. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
To prevent the receiver from being overwhelmed by incoming data.
A. flow control b. session establishment c. numbering and sequencing
A. they initiate data exchanges b. they may upload data to servers

49. If you have a small network w/ 3 computers...
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
Network Media Control
A. enable mode b. priviledge executive mode
When connecting a host to a switch.

50. An admin needs to keep contents private - which access method should he use?
SSH
A. Physical b. Data Link
Router(config)# hostname Costas
A. replace a switch w/ a router b. subnet the new networks