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 do the intermediary devices in the network do?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. application b. services
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Network address

2. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. it has centralized administration b. security is easier to enforce
A random delay helps prevent the stations from experiencing another collision during transmission.
It provides interface between applications on either end of the network.

3. Which 2 options represent Layer 4 addressing?
Source and Destination Ports
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. goodput b. throughput c. bandwidth
A physical topology.

4. When do changes take effect in a Cisco router?
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media
A. physical layer b. DLL layer
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
As the commands are entered.

5. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
To enable a receiving host to forward the data to the appropriate application.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
0 to 1023
Network Layer Packet

6. What information is added during encapsulation at OSI Layer 3?
Rollover cable
Source and Destination IP address
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network address

7. What is a benefit of a WAN?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host mobility
A. flow control b. session establishment c. numbering and sequencing

8. 3 functions of the upper data link sublayer in the OSI model
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. performance degradation b. security issues c. host identification
A. low overhead b. connectionless

9. What characteristic of an UTP helps reduce interference?
Network Access
Twisting of the cables
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
A. DNS b. SMTP c. POP

10. What is a disadvantage of Telnet?
When connecting a host to a switch.
The packets will be delivered and reassembled at destination.
Identify the device that allows local network computers to communicate w/ devices in other networks.
It does not support encryption.

11. What info is found in the TCP and UDP header info?
Source and Destination Ports
Resolve IPv4 addresses to MAC addresses.
It reduces unnecessary broadcasts.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

12. 3 primary functions of the data link layer encapsulation
As the commands are entered.
A. addressing b. error detection c. frame delimiting
A. purpose b. geographic location c. ownership
Physical

13. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
8
DNS
0 to 1023
A. they initiate data exchanges b. they may upload data to servers

14. What correctly describes a MAC address?
A. application b. services
Twisting of the cables
To enable a receiving host to forward the data to the appropriate application.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

15. What method of signal transmission uses radio waves to carry signals?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. non-deterministic b. less overhead c. collisions exist
Wireless
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

16. Group of hosts that have identical bit patterns in the high order bits of their addresses
255.255.255.0
When connecting a host to a switch.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network

17. 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?
A. DNS b. SMTP c. POP
2046
Source Port
The MAC protocol can be very simple.

18. When a device is moved from one network to the other...?
A. media sharing b. logical topology
It provides for the exchange of data over a common local media.
To facilitate the entry and exit of data on media.
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

19. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. goodput b. throughput c. bandwidth
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

20. Why are port numbers included in the TCP header of a segment?
OTDR
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
To enable a receiving host to forward the data to the appropriate application.
A. media sharing b. logical topology

21. What is dinamically selected by the source host when forwarding data?
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
DNS
Network Layer
Source Port

22. What are 3 common problems w/ large networks?
A. MTA b. SMTP
A. perform degradation b. security issues c. host identification
A. show startup-config b. show running-config
To enable a receiving host to forward the data to the appropriate application.

23. Intermediary devices used to implement security between networks
Create signals that represent the bits in each frame for the media.
A. router b. firewall
Network portion
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

24. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Resolve IPv4 addresses to MAC addresses.
Router(config)# interface FastEthernet 0/1
Is used by the server to resolve names.
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

25. What command can be used to determine if the router has experienced any input or output errors?
Router(config)# interface FastEthernet 0/1
A. DNS b. SMTP c. POP
The address of the router that the host will use to 'get to the other side'.
Show Interfaces

26. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Any device whose backoff timer expires first.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
MAC
Identify the device that allows local network computers to communicate w/ devices in other networks.

27. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Next-Hop Address
OTDR
Logical Link Control sublayer

28. What are 2 commands used to view a host routing table?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Logical Link Control sublayer
Network Layer Packet
A. netstat -r b. route PRINT

29. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
TCP initializes the sequence numbers for the sessions.

30. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
Show Interfaces
A. flow control b. session establishment c. numbering and sequencing
255.255.255.224

31. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A backbone cable.
Fiber
TCP initializes the sequence numbers for the sessions.
It uses support from the lower layers to distinguish between connections to the service.

32. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. flow control b. session establishment c. numbering and sequencing
A. non-deterministic b. less overhead c. collisions exist
Hosts return to listen-before-transmit mode.
255.255.255.224

33. What determines the method of media access control?
Transport
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media
A. media sharing b. logical topology

34. What is the primary rope of the physical layer in transmitting data?
They must wait until the first hosts finish transfering the media.
Network Media Control
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Create signals that represent the bits in each frame for the media.

35. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Router(config)# interface FastEthernet 0/1
Fiber
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Switch

36. What is the role of the OSI Application Layer?
Network Media Control
A. larger address space b. data types and classes of service c. authentication and encryption
Create signals that represent the bits in each frame for the media.
It provides interface between applications on either end of the network.

37. To make a console connection from a comp to a Cisco router - what cable should be used?
Network Layer Packet
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.
Rollover cable

38. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. application b. services
A. performance degradation b. security issues c. host identification
It provides interface between applications on either end of the network.
A random delay helps prevent the stations from experiencing another collision during transmission.

39. 2 most commonly used media types in ethernet networks
A. show startup-config b. show running-config
Create signals that represent the bits in each frame for the media.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. copper UTP b. optical fiber

40. Which IP packet field will prevent endless loops?
MAC
To prevent the receiver from being overwhelmed by incoming data.
Time-to-live (TTL)
Window Size

41. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
Time-to-live (TTL)
A. netstat -r b. route PRINT
172.16.192.160

42. In a connectionless system - What is correct?
Network Media Control
Console interface
Static
Destination is not contacted before a packet is sent.

43. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. MTA b. SMTP
The destination host address.
A. enable mode b. priviledge executive mode

44. 3 properties of peer-2-peer applications
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
FTP
Originate data flow.

45. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A physical topology.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Any device whose backoff timer expires first.

46. 2 functions of encapsulation
A. netstat -r b. route PRINT
Network Media Control
A. decentralized resources b. resource sharing w/o a dedicated server
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

47. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
It uses lasers as the light source.
Router(config)# interface FastEthernet 0/1
Destination is not contacted before a packet is sent.

48. Default Gateway is incorrect on the host - What is the impact on the communications?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Resolve IPv4 addresses to MAC addresses.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
To prevent the receiver from being overwhelmed by incoming data.

49. What causes crosstalk within cable pairs when using UTP?
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
The magnetic field around the adjacent pairs of wire.
No collisions will occur on this link.
MAC

50. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Show Interfaces
OTDR