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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. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Resolve IPv4 addresses to MAC addresses.
Is used by the server to resolve names.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

2. What are 2 email components used to forward mail between servers?
The MAC protocol can be very simple.
Is used by the server to resolve names.
A. MTA b. SMTP
IP is not properly installed

3. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A default gateway (router).
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Application Layer

4. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Originate data flow.
255.255.255.224
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Router(config)# interface FastEthernet 0/1

5. What is an automated service that matches resource names w/ required IP addresses?
It uses support from the lower layers to distinguish between connections to the service.
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
DNS
A random delay helps prevent the stations from experiencing another collision during transmission.

6. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. larger address space b. data types and classes of service c. authentication and encryption
It has expanded adressing capabilities.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

7. What do you need to use for an initial configuration on a Cisco router?
The packets will be delivered and reassembled at destination.
A. decentralized resources b. resource sharing w/o a dedicated server
Console interface
Any device whose backoff timer expires first.

8. When is a straight-through cable used in a network?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
When connecting a host to a switch.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network Layer

9. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
Host mobility
MAC
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

10. What type of network cable is used between a terminal and a console port?
A. non-deterministic b. less overhead c. collisions exist
Rollover cable
The magnetic field around the adjacent pairs of wire.
Is used by the server to resolve names.

11. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network portion
0 to 1023
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

12. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. it has centralized administration b. security is easier to enforce
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

13. What is the purpose of the TCP/IP Network Application Layer?
Router(config)# interface FastEthernet 0/1
Network Media Control
A. non-deterministic b. less overhead c. collisions exist
Minimal delays in data delivery.

14. What type of routing uses information that is manually entered into the routing table?
Flash
Static
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
OTDR

15. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Time-to-live (TTL)
Source and Destination IP address
The physical address is added.

16. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A. MTA b. SMTP
A. media sharing b. logical topology
They must wait until the first hosts finish transfering the media.

17. 3 protocols that operate in the application layer
It has expanded adressing capabilities.
A. non-deterministic b. less overhead c. collisions exist
Source and Destination Ports
A. DNS b. SMTP c. POP

18. What application layer protocol is used to support file transfers between client and server?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
FTP
Hosts return to listen-before-transmit mode.

19. What are 3 properties of contention-based media access for a shared media?
Network portion
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Rollover cable
A. non-deterministic b. less overhead c. collisions exist

20. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
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
32 bits
255.255.255.0

21. What are 2 features of User Diagram Protocol (UDP)?
A. MTA b. SMTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. low overhead b. connectionless
Source and Destination Ports

22. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Hosts return to listen-before-transmit mode.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Rollover cable
Host A

23. What is the primary rope of the physical layer in transmitting data?
Fiber
IP is not properly installed
Create signals that represent the bits in each frame for the media.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

24. What device can check for faults - integrity and performance of media?
DNS
Minimal delays in data delivery.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
OTDR

25. There are too many broadcasts on switches - what can be done?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. HTTP b. HTTPS
Rollover cable
A. replace a switch w/ a router b. subnet the new networks

26. 2 characteristics of peer-2-peer
To facilitate the entry and exit of data on media.
A. HTTP b. HTTPS
Window Size
A. decentralized resources b. resource sharing w/o a dedicated server

27. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
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)
To prevent the receiver from being overwhelmed by incoming data.

28. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
When connecting a host to a switch.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A default gateway (router).
A. Physical b. Data Link

29. What is the role of MTA in handling email?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Destination is not contacted before a packet is sent.
A random delay helps prevent the stations from experiencing another collision during transmission.

30. During encapsulation - what happens in the Data Link Layer?
Console
IP Protocol
The physical address is added.
A. they initiate data exchanges b. they may upload data to servers

31. When do changes take effect in a Cisco router?
A. physical layer b. DLL layer
A default gateway (router).
They must wait until the first hosts finish transfering the media.
As the commands are entered.

32. What command is used to change the default name to 'Costas'?
Signal loss can be experienced.
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
Router(config)# hostname Costas
TCP initializes the sequence numbers for the sessions.

33. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

34. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Collisions can decrease network performance.
Fiber
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Console

35. What are the advantages of using a client-server model?
A. perform degradation b. security issues c. host identification
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
DNS
A. it has centralized administration b. security is easier to enforce

36. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
Source and Destination IP address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. perform degradation b. security issues c. host identification

37. statements of IP adressing
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. the router will discard the packet b. the router will send a time exceeded message to the source host
Destination Network Address
Show Interfaces

38. 3 common problems w/ a large network
Network Access
A. netstat -r b. route PRINT
A. performance degradation b. security issues c. host identification
Static

39. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It provides interface between applications on either end of the network.
UTP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Hosts return to listen-before-transmit mode.

40. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. DB 60 b. Winchester 15-pin c. smart serial
SMB
Network address
OTDR

41. How many bits make up an IPv4 address?
It provides for the exchange of data over a common local media.
TCP initializes the sequence numbers for the sessions.
32 bits
Identify the device that allows local network computers to communicate w/ devices in other networks.

42. 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
Hub
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)

43. What method of signal transmission uses radio waves to carry signals?
Wireless
Static
Physical
The packets will be delivered and reassembled at destination.

44. What is a protocol that provides connectionless network layer services?
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
IP Protocol
Time-to-live (TTL)
80 (HTTP)

45. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
32 bits
To enable a receiving host to forward the data to the appropriate application.
Application Layer

46. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Network portion
The packets will be delivered and reassembled at destination.

47. Which portion of the network layer address does a router use to forward packets?
Network
32 bits
Destination is not contacted before a packet is sent.
Network portion

48. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
A. minimizing of collisions b. division into broadcast domains
A. hot keys b. context-sensitive c. command syntax check
It uses lasers as the light source.

49. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
The address of the router that the host will use to 'get to the other side'.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It does not support encryption.

50. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
To prevent the receiver from being overwhelmed by incoming data.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Destination Network Address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.