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. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
The address of the router that the host will use to 'get to the other side'.
IP is not properly installed
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

2. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Layer
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
It reduces unnecessary broadcasts.

3. What are 2 common characteristics associated w/ dynamic routing protocols?
IP Protocol
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. non-deterministic b. less overhead c. collisions exist

4. What info is found in the TCP and UDP header info?
It provides for the exchange of data over a common local media.
Source and Destination Ports
Time-to-live (TTL)
As the commands are entered.

5. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
When connecting a host to a switch.
A. copper UTP b. optical fiber
A. netstat -r b. route PRINT

6. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
A. HTTP b. HTTPS
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Time-to-live (TTL)

7. Which layer supplies services and allows user interface?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. they initiate data exchanges b. they may upload data to servers
Application Layer
Router

8. What application layer protocol is used to support file transfers between client and server?
FTP
When connecting a host to a switch.
It uses lasers as the light source.
SMB

9. What does the IEEE 802.2 standard represent in Ethernet technologies?
32 bits
Logical Link Control sublayer
A. media sharing b. logical topology
Create signals that represent the bits in each frame for the media.

10. What is a default gateway address?

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11. What event occurs during the 3-way handshake?
The address of the router that the host will use to 'get to the other side'.
TCP initializes the sequence numbers for the sessions.
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
Application Layer

12. At which layer of the TCP/IP model does ethernet operate?
Logical Link Control sublayer
172.16.192.160
A. goodput b. throughput c. bandwidth
Network Access

13. 3 facts about the network portion of an IPv4 address
Console
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Is used by the server to resolve names.
Physical

14. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
32 bits
The packets will be delivered and reassembled at destination.
Application Layer

15. What describes the purpose of default route?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Fiber
When connecting a host to a switch.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

16. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
The MAC protocol can be very simple.
Window Size
Hub
80 (HTTP)

17. What type of routing uses information that is manually entered into the routing table?
SMB
Console interface
Static
Host mobility

18. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
A. addressing b. error detection c. frame delimiting
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
Ctrl + Shift + 6

19. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. Cat5 UTP b. Cat6 UTP
Fiber
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It does not support encryption.

20. If you have a small network w/ 3 computers...
A. DB 60 b. Winchester 15-pin c. smart serial
A. netstat -r b. route PRINT
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
Twisting of the cables

21. What device can check for faults - integrity and performance of media?
Console
OTDR
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Console interface

22. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
A default gateway (router).
IP is not properly installed
A. they initiate data exchanges b. they may upload data to servers

23. What characteristic of an UTP helps reduce interference?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Twisting of the cables
UDP
Is a layer of specific encapsulation.

24. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
SMB
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

25. What are 3 pieces of info about a route contained in a routing table?
Identify processes or services that are communicating with end devices.
Time-to-live (TTL)
A. application b. services
A. next-hop b. metric/interface c. destination network address

26. What command is used to change the default name to 'Costas'?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. Cat5 UTP b. Cat6 UTP
Application Layer
Router(config)# hostname Costas

27. In a connectionless system - What is correct?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
The packets will be delivered and reassembled at destination.
Destination is not contacted before a packet is sent.
Signal loss can be experienced.

28. What 2 type of cables would most commonly be used for new runs?
172.16.192.160
A. Cat5 UTP b. Cat6 UTP
Identify processes or services that are communicating with end devices.
A. DB 60 b. Winchester 15-pin c. smart serial

29. What is the purpose of the preamble in an ethernet frame?
TCP initializes the sequence numbers for the sessions.
It provides interface between applications on either end of the network.
A. low overhead b. connectionless
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

30. What is the primary purpose of ARP?
Network Layer Packet
It uses lasers as the light source.
Resolve IPv4 addresses to MAC addresses.
2046

31. 2 features that make switches preferable to hubs
The physical address is added.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. minimizing of collisions b. division into broadcast domains

32. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Logical Link Control sublayer
A. minimizing of collisions b. division into broadcast domains
OTDR

33. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Network portion
A. show startup-config b. show running-config
Source Port
Switch

34. During encapsulation - what happens in the Data Link Layer?
It has expanded adressing capabilities.
The physical address is added.
FTP
A. router b. firewall

35. What is the purpose of the TCP/IP Network Application Layer?
Ctrl + Shift + 6
A. flow control b. session establishment c. numbering and sequencing
Network Media Control
Static

36. When a network service fails - which port is most often used to access a router for management purposes?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Console
Destination Network Address
Next-Hop Address

37. statements of IP adressing
MAC
Signal loss can be experienced.
172.16.192.160
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

38. What are the advantages of using a client-server model?
A. minimizing of collisions b. division into broadcast domains
Destination Network Address
A. application b. services
A. it has centralized administration b. security is easier to enforce

39. What makes fiber preferable to copper for interconnecting buildings?
Show Interfaces
A. they initiate data exchanges b. they may upload data to servers
UDP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

40. What is the function of the DLL?
It provides for the exchange of data over a common local media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
The packets will be delivered and reassembled at destination.
Show Interfaces

41. 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
172.16.192.160
Application Layer
Host A

42. What command can be used to determine if the router has experienced any input or output errors?
IP is not properly installed
Any device whose backoff timer expires first.
Show Interfaces
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

43. When do changes take effect in a Cisco router?
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. identifies the communicating applications b. identifies multiple conversations between the hosts
As the commands are entered.
A. replace a switch w/ a router b. subnet the new networks

44. 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
Collisions can decrease network performance.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Minimal delays in data delivery.

45. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
They must wait until the first hosts finish transfering the media.
The physical address is added.
Rollover cable

46. What can you identify when you examine the Network Layer header?
To enable a receiving host to forward the data to the appropriate application.
The destination host address.
80 (HTTP)
Destination Network Address

47. What is the purpose of resource records in DNS?
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.
Flash
Router(config)# hostname Costas

48. Network Protocols
A. goodput b. throughput c. bandwidth
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
255.255.255.0
A. the router will discard the packet b. the router will send a time exceeded message to the source host

49. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. netstat -r b. route PRINT

50. Default Gateway is incorrect on the host - What is the impact on the communications?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. purpose b. geographic location c. ownership
Router(config)# interface FastEthernet 0/1
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.