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 common problems w/ a large network
A. performance degradation b. security issues c. host identification
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The destination host address.
Network Layer Packet

2. What can get you to an outside network?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A default gateway (router).
Network address
A. physical layer b. DLL layer

3. What connectors are commonly associated w/ Cisco's V.35 serial cables?
RJ-45
Twisting of the cables
Collisions can decrease network performance.
A. DB 60 b. Winchester 15-pin c. smart serial

4. What is a default gateway address?

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5. What are 2 common characteristics associated w/ dynamic routing protocols?
A. purpose b. geographic location c. ownership
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Binary ANDing
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

6. What is a component of a routing table entry?
Console
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Next-Hop Address
A. flow control b. session establishment c. numbering and sequencing

7. To make a console connection from a comp to a Cisco router - what cable should be used?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Twisting of the cables
Rollover cable
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

8. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Identify processes or services that are communicating with end devices.
UTP
Router
The magnetic field around the adjacent pairs of wire.

9. What is the purpose of a default gateway?
Source and Destination Ports
Window Size
Identify the device that allows local network computers to communicate w/ devices in other networks.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

10. At which layer of the TCP/IP model does ethernet operate?
A. addressing b. error detection c. frame delimiting
Network Access
A. HTTP b. HTTPS
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

11. 3 facts about the network portion of an IPv4 address
Minimal delays in data delivery.
Identify the device that allows local network computers to communicate w/ devices in other networks.
The physical address is added.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

12. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Source Port
The destination host address.
A. enable mode b. priviledge executive mode
80 (HTTP)

13. 2 characteristics of peer-2-peer
A. Cat5 UTP b. Cat6 UTP
A backbone cable.
A. they initiate data exchanges b. they may upload data to servers
A. decentralized resources b. resource sharing w/o a dedicated server

14. What is an effect of improperly applying a network cable connector?
80 (HTTP)
Fiber
A. hot keys b. context-sensitive c. command syntax check
Signal loss can be experienced.

15. 3 properties of peer-2-peer applications
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
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The MAC protocol can be very simple.
To prevent the receiver from being overwhelmed by incoming data.

16. Important characteristic of UDP
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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Network
Minimal delays in data delivery.

17. How does the application layer on a server process multiple client requests for services?
172.16.192.160
It uses support from the lower layers to distinguish between connections to the service.
Network
UTP

18. What is a benefit of a WAN?
Host mobility
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
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Is used by the server to resolve names.

19. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. it has centralized administration b. security is easier to enforce
Rollover cable
SSH

20. What event occurs during the 3-way handshake?
0 to 1023
TCP initializes the sequence numbers for the sessions.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. router b. firewall

21. After an ethernet collision - which device has priority to transmit data?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Any device whose backoff timer expires first.
A. enable mode b. priviledge executive mode
255.255.255.224

22. Which device is used to create or divide broadcast domains?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The destination host address.
Router
A. enable mode b. priviledge executive mode

23. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
Network Media Control
Destination is not contacted before a packet is sent.
Signal loss can be experienced.

24. 3 functions of the upper data link sublayer in the OSI model
Switch
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
SMB
80 (HTTP)

25. Which IP packet field will prevent endless loops?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Signal loss can be experienced.
Time-to-live (TTL)
To enable a receiving host to forward the data to the appropriate application.

26. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Destination Network Address
Show Interfaces
Is a layer of specific encapsulation.

27. Network Protocols
The destination host address.
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. media sharing b. logical topology
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

28. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
UDP
Supports error detection.
A. replace a switch w/ a router b. subnet the new networks

29. What are 3 pieces of info about a route contained in a routing table?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Next-Hop Address
A. next-hop b. metric/interface c. destination network address
A. servers b. routers c. network printers

30. What do you need to use for an initial configuration on a Cisco router?
Originate data flow.
MAC
It uses lasers as the light source.
Console interface

31. Where is the IOS file stored at?
Flash
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. physical layer b. DLL layer
Destination is not contacted before a packet is sent.

32. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
8

33. What type of network cable is used between a terminal and a console port?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
0 to 1023
Rollover cable
Network Access

34. An admin needs to keep contents private - which access method should he use?
Source and Destination Ports
Network Access
SSH
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35. Default Gateway is incorrect on the host - What is the impact on the communications?
A. enable mode b. priviledge executive mode
Console interface
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. perform degradation b. security issues c. host identification

36. When a device is moved from one network to the other...?
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
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
Router(config)# hostname Costas
Network Layer

37. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
Network Access
Transport
Network Layer

38. What is the function of the DLL?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
To prevent the receiver from being overwhelmed by incoming data.
It provides for the exchange of data over a common local media.
Network address

39. 2 most commonly used media types in ethernet networks
The address of the router that the host will use to 'get to the other side'.
A. physical layer b. DLL layer
A. copper UTP b. optical fiber
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

40. Why are port numbers included in the TCP header of a segment?
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
To enable a receiving host to forward the data to the appropriate application.
RJ-45
It does not support encryption.

41. What layer encapsulates segments into packets?
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. decentralized resources b. resource sharing w/o a dedicated server
Network Layer
OTDR

42. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Source and Destination Ports
255.255.255.0
A. media sharing b. logical topology
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

43. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Destination is not contacted before a packet is sent.
80 (HTTP)
Source Port
A. copper UTP b. optical fiber

44. 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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
It reduces unnecessary broadcasts.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

45. Which portion of the network layer address does a router use to forward packets?
Network portion
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
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. identifies the communicating applications b. identifies multiple conversations between the hosts

46. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Physical
A. Physical b. Data Link
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The MAC protocol can be very simple.

47. What is the primary function of encapsulating packets into frames?
Network address
Network Access
To facilitate the entry and exit of data on media.
Network portion

48. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Any device whose backoff timer expires first.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. servers b. routers c. network printers
IP is not properly installed

49. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Router(config)# hostname Costas
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Rollover cable

50. What is PDU?
Resolve IPv4 addresses to MAC addresses.
Is a layer of specific encapsulation.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows