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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. 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?
Next-Hop Address
A. show startup-config b. show running-config
Is used by the server to resolve names.
A default gateway (router).

2. What device can check for faults - integrity and performance of media?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
2046
OTDR
A. non-deterministic b. less overhead c. collisions exist

3. What is an effect of improperly applying a network cable connector?
Twisting of the cables
Source and Destination Ports
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Signal loss can be experienced.

4. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
To facilitate the entry and exit of data on media.
Rollover cable
UTP

5. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
It uses lasers as the light source.
MAC
A. media sharing b. logical topology
A. enable mode b. priviledge executive mode

6. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
A. enable mode b. priviledge executive mode
32 bits
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

7. What layer encapsulates segments into packets?
It uses support from the lower layers to distinguish between connections to the service.
Network Layer
The address of the router that the host will use to 'get to the other side'.
Flash

8. Which combination of keys can be used to interrupt a ping or traceroute process?
A. low overhead b. connectionless
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Ctrl + Shift + 6
Transport

9. What are 3 properties of contention-based media access for a shared media?
IP is not properly installed
FTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. non-deterministic b. less overhead c. collisions exist

10. What application layer protocol is used to support file transfers between client and server?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Destination is not contacted before a packet is sent.
A. they initiate data exchanges b. they may upload data to servers
FTP

11. An admin needs to keep contents private - which access method should he use?
SSH
A. Physical b. Data Link
Console
Collisions can decrease network performance.

12. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. low overhead b. connectionless
255.255.255.224
Hosts return to listen-before-transmit mode.
As the commands are entered.

13. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
IP is not properly installed
Originate data flow.
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

14. When do changes take effect in a Cisco router?
A random delay helps prevent the stations from experiencing another collision during transmission.
As the commands are entered.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

15. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
When connecting a host to a switch.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A physical topology.

16. 2 functions of encapsulation
Network Access
Twisting of the cables
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. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server

17. What are 2 features of User Diagram Protocol (UDP)?
Network Layer Packet
A. low overhead b. connectionless
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
They must wait until the first hosts finish transfering the media.

18. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
A. flow control b. session establishment c. numbering and sequencing
Source and Destination Ports
Identify processes or services that are communicating with end devices.

19. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Any device whose backoff timer expires first.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. goodput b. throughput c. bandwidth
SMB

20. Which device is used to create or divide broadcast domains?
Show Interfaces
Network address
A. perform degradation b. security issues c. host identification
Router

21. 3 properties of peer-2-peer applications
A. hot keys b. context-sensitive c. command syntax check
Rollover cable
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

22. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
172.16.192.160
A. copper UTP b. optical fiber
8
Fiber

23. What do the intermediary devices in the network do?
A. purpose b. geographic location c. ownership
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Hub
A. perform degradation b. security issues c. host identification

24. What is a disadvantage of Telnet?
It does not support encryption.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Router(config)# interface FastEthernet 0/1
Host A

25. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. router b. firewall
It does not support encryption.
255.255.255.0
TCP initializes the sequence numbers for the sessions.

26. 3 measures of data transfer
SSH
Network Access
A. goodput b. throughput c. bandwidth
Network

27. Which IP packet field will prevent endless loops?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It provides for the exchange of data over a common local media.
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.

28. What characteristic of an UTP helps reduce interference?
A. MTA b. SMTP
A. addressing b. error detection c. frame delimiting
Network Layer
Twisting of the cables

29. 3 features of IPv6
Source and Destination Ports
A. larger address space b. data types and classes of service c. authentication and encryption
Supports error detection.
Switch

30. What type of network cable is used between a terminal and a console port?
SSH
Hosts return to listen-before-transmit mode.
Rollover cable
The physical address is added.

31. What method of signal transmission uses radio waves to carry signals?
Wireless
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Rollover cable

32. 2 characteristics of clients in data networks
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. replace a switch w/ a router b. subnet the new networks
A. they initiate data exchanges b. they may upload data to servers
It reduces unnecessary broadcasts.

33. What are 2 commands used to view a host routing table?
To enable a receiving host to forward the data to the appropriate application.
A. netstat -r b. route PRINT
Router(config)# interface FastEthernet 0/1
The packets will be delivered and reassembled at destination.

34. When is a straight-through cable used in a network?
When connecting a host to a switch.
Is a layer of specific encapsulation.
A. DNS b. SMTP c. POP
Window Size

35. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Window Size
A. replace a switch w/ a router b. subnet the new networks
Destination is not contacted before a packet is sent.

36. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
Resolve IPv4 addresses to MAC addresses.
A random delay helps prevent the stations from experiencing another collision during transmission.
Source and Destination IP address

37. Which portion of the network layer address does a router use to forward packets?
A. HTTP b. HTTPS
The magnetic field around the adjacent pairs of wire.
A. flow control b. session establishment c. numbering and sequencing
Network portion

38. In business LANs - which connector is used w/ twisted-pair networking cable?
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. not affected by EMI of RFI b. most expensive type of LAN cabling
RJ-45
It uses support from the lower layers to distinguish between connections to the service.

39. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
It does not support encryption.
Next-Hop Address
TCP initializes the sequence numbers for the sessions.

40. What is the purpose of a default gateway?
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
SSH
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. show startup-config b. show running-config

41. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Wireless
It provides interface between applications on either end of the network.
Is used by the server to resolve names.

42. 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
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
Destination is not contacted before a packet is sent.
FTP

43. After an ethernet collision - which device has priority to transmit data?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Any device whose backoff timer expires first.
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry

44. What is the primary reason for developing IPv6?
Router(config)# hostname Costas
It has expanded adressing capabilities.
80 (HTTP)
A. MTA b. SMTP

45. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. application b. services
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Supports error detection.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

46. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. Physical b. Data Link
To prevent the receiver from being overwhelmed by incoming data.
Router(config)# interface FastEthernet 0/1
255.255.255.224

47. What is a drawback of the CSMA/CD access method?
Network address
Collisions can decrease network performance.
The address of the router that the host will use to 'get to the other side'.
A. DNS b. SMTP c. POP

48. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
A. copper UTP b. optical fiber
Create signals that represent the bits in each frame for the media.
To prevent the receiver from being overwhelmed by incoming data.

49. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Twisting of the cables
Network
It uses lasers as the light source.
A. Physical b. Data Link

50. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Application Layer
A. purpose b. geographic location c. ownership
Show Interfaces