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 kind of problems are caused by excessive broadcast traffic on network segments?
A. hot keys b. context-sensitive c. command syntax check
Supports error detection.
It does not support encryption.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

2. At which layers of the OSI model does ethernet operate?
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
A. physical layer b. DLL layer
A. hot keys b. context-sensitive c. command syntax check

3. Important characteristic of UDP
Logical Link Control sublayer
Console
Network
Minimal delays in data delivery.

4. 3 terms that define the forms of help available within the Cisco IOS
No collisions will occur on this link.
A. application b. services
A backbone cable.
A. hot keys b. context-sensitive c. command syntax check

5. What command can be used to determine if the router has experienced any input or output errors?
A. purpose b. geographic location c. ownership
To enable a receiving host to forward the data to the appropriate application.
OTDR
Show Interfaces

6. What is the function of the DLL?
Network Media Control
Minimal delays in data delivery.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
It provides for the exchange of data over a common local media.

7. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
SMB
Console
A. MTA b. SMTP

8. What determines the method of media access control?
DNS
A. flow control b. session establishment c. numbering and sequencing
A. media sharing b. logical topology
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

9. When a device is moved from one network to the other...?
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
It provides for the exchange of data over a common local media.
A. replace a switch w/ a router b. subnet the new networks
0 to 1023

10. Which device is used to create or divide broadcast domains?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Console interface
RJ-45
Router

11. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
Signal loss can be experienced.
Network Media Control
Resolve IPv4 addresses to MAC addresses.

12. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Static
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

13. What is the purpose of a default gateway?
Destination is not contacted before a packet is sent.
A. performance degradation b. security issues c. host identification
A. decentralized resources b. resource sharing w/o a dedicated server
Identify the device that allows local network computers to communicate w/ devices in other networks.

14. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Fiber
A. low overhead b. connectionless
UTP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

15. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
SMB
Collisions can decrease network performance.
Network Access

16. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. hot keys b. context-sensitive c. command syntax check
8
UTP

17. What is a characteristic of a logical point-to-point topology?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. flow control b. session establishment c. numbering and sequencing
The MAC protocol can be very simple.
A. replace a switch w/ a router b. subnet the new networks

18. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. hot keys b. context-sensitive c. command syntax check
A. DB 60 b. Winchester 15-pin c. smart serial
SMB
Host mobility

19. Which layer supplies services and allows user interface?
Application Layer
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
OTDR

20. What are 2 common characteristics associated w/ dynamic routing protocols?
The magnetic field around the adjacent pairs of wire.
Collisions can decrease network performance.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
UDP

21. 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?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. netstat -r b. route PRINT
MAC
8

22. Default Gateway is incorrect on the host - What is the impact on the communications?
Console
Network
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

23. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Supports error detection.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Show Interfaces

24. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Any device whose backoff timer expires first.
A. router b. firewall
A. Physical b. Data Link
Twisting of the cables

25. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
To prevent the receiver from being overwhelmed by incoming data.
A. decentralized resources b. resource sharing w/o a dedicated server
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

26. How does the application layer on a server process multiple client requests for services?
Any device whose backoff timer expires first.
2046
It uses support from the lower layers to distinguish between connections to the service.
A. next-hop b. metric/interface c. destination network address

27. 3 statements about the role of routers in the network
A. performance degradation b. security issues c. host identification
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Show Interfaces
Network Access

28. Why is flow control used for TCP data transfer?
A. hot keys b. context-sensitive c. command syntax check
To facilitate the entry and exit of data on media.
Source and Destination Ports
To prevent the receiver from being overwhelmed by incoming data.

29. What can be a problem that is reduced by adding end-to-end addressing?
UTP
It reduces unnecessary broadcasts.
The address of the router that the host will use to 'get to the other side'.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

30. What is a disadvantage of Telnet?
It does not support encryption.
Wireless
Host A
Binary ANDing

31. 2 functions of encapsulation
Network address
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
A. netstat -r b. route PRINT
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

32. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Hub
Physical
A. MTA b. SMTP
Supports error detection.

33. What are 2 commands used to view a host routing table?
The packets will be delivered and reassembled at destination.
Any device whose backoff timer expires first.
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. netstat -r b. route PRINT

34. What is the purpose of resource records in DNS?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Is used by the server to resolve names.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Flash

35. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A. servers b. routers c. network printers
0 to 1023
Host mobility

36. What 2 type of cables would most commonly be used for new runs?
A. minimizing of collisions b. division into broadcast domains
A. Cat5 UTP b. Cat6 UTP
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
Flash

37. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The magnetic field around the adjacent pairs of wire.
Network address
A. DNS b. SMTP c. POP

38. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Identify the device that allows local network computers to communicate w/ devices in other networks.
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

39. When is a straight-through cable used in a network?
When connecting a host to a switch.
Physical
Source and Destination Ports
A. application b. services

40. 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?
Host A
Signal loss can be experienced.
Network Access
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

41. 3 facts about the network portion of an IPv4 address
Router(config)# hostname Costas
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Supports error detection.
To enable a receiving host to forward the data to the appropriate application.

42. What are 3 pieces of info about a route contained in a routing table?
IP is not properly installed
A. next-hop b. metric/interface c. destination network address
A physical topology.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

43. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Binary ANDing
Minimal delays in data delivery.
DNS

44. In business LANs - which connector is used w/ twisted-pair networking cable?
A. decentralized resources b. resource sharing w/o a dedicated server
A. application b. services
RJ-45
Network Access

45. What is the role of the OSI Application Layer?
A. HTTP b. HTTPS
It provides interface between applications on either end of the network.
A. MTA b. SMTP
A backbone cable.

46. What is a protocol that provides connectionless network layer services?
IP Protocol
Console interface
OTDR
Flash

47. What is the role of MTA in handling email?
Rollover cable
Minimal delays in data delivery.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
255.255.255.0

48. What describes the purpose of default route?
No collisions will occur on this link.
The packets will be delivered and reassembled at destination.
A random delay helps prevent the stations from experiencing another collision during transmission.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

49. At which layer of the TCP/IP model does ethernet operate?
Network Access
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
Switch
As the commands are entered.

50. What is PDU?
A. decentralized resources b. resource sharing w/o a dedicated server
Rollover cable
Is a layer of specific encapsulation.
They must wait until the first hosts finish transfering the media.