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 a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. Physical b. Data Link
A. show startup-config b. show running-config
Window Size
A. next-hop b. metric/interface c. destination network address

2. 3 terms that define the forms of help available within the Cisco IOS
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. hot keys b. context-sensitive c. command syntax check
A. physical layer b. DLL layer
Rollover cable

3. What can you identify when you examine the Network Layer header?
The magnetic field around the adjacent pairs of wire.
The destination host address.
172.16.192.160
The physical address is added.

4. What is an effect of improperly applying a network cable connector?
Create signals that represent the bits in each frame for the media.
Signal loss can be experienced.
Hosts return to listen-before-transmit mode.
Source Port

5. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Is used by the server to resolve names.
A. hot keys b. context-sensitive c. command syntax check
A. enable mode b. priviledge executive mode
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

6. What is the function of the DLL?
It reduces unnecessary broadcasts.
2046
It provides for the exchange of data over a common local media.
A. servers b. routers c. network printers

7. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
IP is not properly installed
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Originate data flow.
Hub

8. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. Physical b. Data Link
Switch
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
0 to 1023

9. If you have a full-duplex operational network - what can happen?
A. perform degradation b. security issues c. host identification
No collisions will occur on this link.
A. DNS b. SMTP c. POP
It provides interface between applications on either end of the network.

10. 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?
Hosts return to listen-before-transmit mode.
Switch
2046
Static

11. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. servers b. routers c. network printers
A. application b. services

12. What is the primary function of encapsulating packets into frames?
As the commands are entered.
A. next-hop b. metric/interface c. destination network address
Transport
To facilitate the entry and exit of data on media.

13. Which 2 options represent Layer 4 addressing?
Router
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. it has centralized administration b. security is easier to enforce
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

14. What are 3 common problems w/ large networks?
SMB
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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. perform degradation b. security issues c. host identification

15. 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
MAC
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

16. 3 statements about the role of routers in the network
Physical
Host A
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
It reduces unnecessary broadcasts.

17. What are 2 commands used to view a host routing table?
Console interface
A. netstat -r b. route PRINT
OTDR
Collisions can decrease network performance.

18. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Network
It has expanded adressing capabilities.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Window Size

19. When destination network is not in the routing table - What are 2 actions the router might take?
Originate data flow.
Resolve IPv4 addresses to MAC addresses.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A default gateway (router).

20. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Time-to-live (TTL)
It has expanded adressing capabilities.
Ctrl + Shift + 6

21. Intermediary devices used to implement security between networks
The address of the router that the host will use to 'get to the other side'.
A. Physical b. Data Link
It uses lasers as the light source.
A. router b. firewall

22. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. media sharing b. logical topology
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
UDP

23. What are 2 forms of application layer software?
A default gateway (router).
A. application b. services
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

24. Which IP packet field will prevent endless loops?
Resolve IPv4 addresses to MAC addresses.
Time-to-live (TTL)
Network Layer Packet
Console interface

25. 3 statements about routes and their use
A. DNS b. SMTP c. POP
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
FTP
Network portion

26. When do changes take effect in a Cisco router?
A. application b. services
Flash
As the commands are entered.
Destination is not contacted before a packet is sent.

27. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. copper UTP b. optical fiber
A physical topology.
A. low overhead b. connectionless
A. physical layer b. DLL layer

28. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Destination Network Address
Host A
Router(config)# interface FastEthernet 0/1
It uses lasers as the light source.

29. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
The address of the router that the host will use to 'get to the other side'.
MAC
UTP

30. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. servers b. routers c. network printers
A. enable mode b. priviledge executive mode
A. they initiate data exchanges b. they may upload data to servers

31. Statements that describe LAN
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
It uses lasers as the light source.
Source and Destination Ports
Is a layer of specific encapsulation.

32. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Host mobility
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The destination host address.
Supports error detection.

33. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. application b. services
Network Layer Packet
Console

34. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. perform degradation b. security issues c. host identification
Any device whose backoff timer expires first.
SMB
A. servers b. routers c. network printers

35. Why are port numbers included in the TCP header of a segment?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. show startup-config b. show running-config
To enable a receiving host to forward the data to the appropriate application.

36. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
When connecting a host to a switch.
Resolve IPv4 addresses to MAC addresses.
Create signals that represent the bits in each frame for the media.

37. What is a characteristic of a single-mode fiber-optic cable?
SSH
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The packets will be delivered and reassembled at destination.
It uses lasers as the light source.

38. At which layer of the TCP/IP model does ethernet operate?
A. they initiate data exchanges b. they may upload data to servers
Network Access
255.255.255.0
Switch

39. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Destination is not contacted before a packet is sent.
Physical
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Switch

40. When a network service fails - which port is most often used to access a router for management purposes?
Network Access
Is used by the server to resolve names.
Console
255.255.255.0

41. What is a protocol that provides connectionless network layer services?
Router(config)# hostname Costas
Network portion
A. replace a switch w/ a router b. subnet the new networks
IP Protocol

42. What is a default gateway address?

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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 Network Address
80 (HTTP)
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

44. What are the advantages of using a client-server model?
A. larger address space b. data types and classes of service c. authentication and encryption
A. it has centralized administration b. security is easier to enforce
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Switch

45. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Flash
A. media sharing b. logical topology

46. Which type of cable is most often associated w/ fiber-optic cable?
A. show startup-config b. show running-config
A. goodput b. throughput c. bandwidth
A backbone cable.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

47. Default Gateway is incorrect on the host - What is the impact on the communications?
A. copper UTP b. optical fiber
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
IP Protocol

48. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Next-Hop Address
It has expanded adressing capabilities.
Is used by the server to resolve names.

49. What can get you to an outside network?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A default gateway (router).
It reduces unnecessary broadcasts.
Router(config)# interface FastEthernet 0/1

50. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
32 bits
Is a layer of specific encapsulation.
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