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 makes fiber preferable to copper for interconnecting buildings?
A. performance degradation b. security issues c. host identification
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It uses support from the lower layers to distinguish between connections to the service.
TCP initializes the sequence numbers for the sessions.

2. What statements describe the logical token-passing topology?
Wireless
A. Cat5 UTP b. Cat6 UTP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Ctrl + Shift + 6

3. At which layer of the TCP/IP model does ethernet operate?
Network Access
Transport
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A random delay helps prevent the stations from experiencing another collision during transmission.

4. What do you need to use for an initial configuration on a Cisco router?
Show Interfaces
Console interface
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Switch

5. What networking devices are recommended to be assigned static IP addresses?
Console
A. performance degradation b. security issues c. host identification
A. servers b. routers c. network printers
Network

6. What is a characteristic of a single-mode fiber-optic cable?
A. enable mode b. priviledge executive mode
It uses lasers as the light source.
Create signals that represent the bits in each frame for the media.
Time-to-live (TTL)

7. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
Supports error detection.
Identify processes or services that are communicating with end devices.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

8. Where is the IOS file stored at?
A default gateway (router).
OTDR
A. Physical b. Data Link
Flash

9. What device can check for faults - integrity and performance of media?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
They must wait until the first hosts finish transfering the media.
0 to 1023
OTDR

10. What is an automated service that matches resource names w/ required IP addresses?
DNS
A. it has centralized administration b. security is easier to enforce
To prevent the receiver from being overwhelmed by incoming data.
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

11. What kind of problems are caused by excessive broadcast traffic on network segments?
IP Protocol
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. larger address space b. data types and classes of service c. authentication and encryption
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

12. 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?
8
Flash
A random delay helps prevent the stations from experiencing another collision during transmission.
Hosts return to listen-before-transmit mode.

13. 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?
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# hostname Costas
A. show startup-config b. show running-config
2046

14. 2 characteristics of clients in data networks
Is used by the server to resolve names.
Network
A. DB 60 b. Winchester 15-pin c. smart serial
A. they initiate data exchanges b. they may upload data to servers

15. What are 3 common problems w/ large networks?
80 (HTTP)
SSH
A. replace a switch w/ a router b. subnet the new networks
A. perform degradation b. security issues c. host identification

16. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. DB 60 b. Winchester 15-pin c. smart serial
A random delay helps prevent the stations from experiencing another collision during transmission.
Time-to-live (TTL)
Any device whose backoff timer expires first.

17. What are key considering factors when grouping hosts into common networks?
Destination is not contacted before a packet is sent.
Logical Link Control sublayer
A. purpose b. geographic location c. ownership
A. application b. services

18. To make a console connection from a comp to a Cisco router - what cable should be used?
The destination host address.
Logical Link Control sublayer
Rollover cable
32 bits

19. Which combination of keys can be used to interrupt a ping or traceroute process?
The destination host address.
It uses lasers as the light source.
Ctrl + Shift + 6
It provides interface between applications on either end of the network.

20. If there is a graphic representation of a company network wiring and equipment - What is this called?
A default gateway (router).
Ctrl + Shift + 6
A. enable mode b. priviledge executive mode
A physical topology.

21. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
Network Media Control
Originate data flow.
OTDR

22. What do the intermediary devices in the network do?
A. performance degradation b. security issues c. host identification
A. flow control b. session establishment c. numbering and sequencing
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

23. Which IP packet field will prevent endless loops?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Time-to-live (TTL)
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

24. During a TCP session - if packets arrive out of order - what will happen?
172.16.192.160
Source and Destination Ports
The packets will be delivered and reassembled at destination.
It provides for the exchange of data over a common local media.

25. What information is added during encapsulation at OSI Layer 3?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
The packets will be delivered and reassembled at destination.
Source and Destination IP address
A. show startup-config b. show running-config

26. Which layer supplies services and allows user interface?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Application Layer
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Any device whose backoff timer expires first.

27. What is the purpose of the preamble in an ethernet frame?
A. hot keys b. context-sensitive c. command syntax check
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
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The packets will be delivered and reassembled at destination.

28. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
TCP initializes the sequence numbers for the sessions.
Router
Switch

29. What can be a problem that is reduced by adding end-to-end addressing?
Network Media Control
Hub
It reduces unnecessary broadcasts.
Is used by the server to resolve names.

30. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. application b. services
Collisions can decrease network performance.
Signal loss can be experienced.

31. What connectors are commonly associated w/ Cisco's V.35 serial cables?
80 (HTTP)
A. DB 60 b. Winchester 15-pin c. smart serial
IP is not properly installed
A. MTA b. SMTP

32. What is the purpose of the TCP/IP Network Application Layer?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Hub
Network Media Control
Hosts return to listen-before-transmit mode.

33. If you have a full-duplex operational network - what can happen?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network portion
It reduces unnecessary broadcasts.
No collisions will occur on this link.

34. When a device is moved from one network to the other...?
Logical Link Control sublayer
It does not support encryption.
255.255.255.0
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

35. What is the primary function of encapsulating packets into frames?
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.
A physical topology.
Next-Hop Address

36. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Signal loss can be experienced.
A. goodput b. throughput c. bandwidth
A. Physical b. Data Link

37. What is dinamically selected by the source host when forwarding data?
Source Port
A default gateway (router).
Next-Hop Address
Flash

38. Which device is used to create or divide broadcast domains?
Host mobility
Router
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
2046

39. What method of signal transmission uses radio waves to carry signals?
Wireless
Time-to-live (TTL)
Console interface
The MAC protocol can be very simple.

40. What are 3 pieces of info about a route contained in a routing table?
A. router b. firewall
A. next-hop b. metric/interface c. destination network address
Network Media Control
A. non-deterministic b. less overhead c. collisions exist

41. 3 properties of peer-2-peer applications
OTDR
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
It uses lasers as the light source.
The physical address is added.

42. 3 primary functions of the data link layer encapsulation
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. addressing b. error detection c. frame delimiting
Is a layer of specific encapsulation.
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

43. Which 2 options represent Layer 4 addressing?
A. addressing b. error detection c. frame delimiting
A. DNS b. SMTP c. POP
Originate data flow.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

44. What determines the method of media access control?
Host A
A. media sharing b. logical topology
FTP
A. MTA b. SMTP

45. What command is used to change the default name to 'Costas'?
Resolve IPv4 addresses to MAC addresses.
A. copper UTP b. optical fiber
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# hostname Costas

46. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Flash
Network address
Hub
A. replace a switch w/ a router b. subnet the new networks

47. When a network service fails - which port is most often used to access a router for management purposes?
8
A default gateway (router).
A. copper UTP b. optical fiber
Console

48. 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?
Time-to-live (TTL)
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. perform degradation b. security issues c. host identification
A. show startup-config b. show running-config

49. 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
It provides interface between applications on either end of the network.
80 (HTTP)
No collisions will occur on this link.

50. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
MAC
The destination host address.
It reduces unnecessary broadcasts.