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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. When a network service fails - which port is most often used to access a router for management purposes?
It uses support from the lower layers to distinguish between connections to the service.
32 bits
Console
A backbone cable.

2. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Source Port
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. physical layer b. DLL layer

3. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Originate data flow.
To prevent the receiver from being overwhelmed by incoming data.
255.255.255.0
Source and Destination Ports

4. Which layer supplies services and allows user interface?
Application Layer
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
Router(config)# interface FastEthernet 0/1
A physical topology.

5. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
The packets will be delivered and reassembled at destination.
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. MTA b. SMTP

6. What are 3 common problems w/ large networks?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Window Size
A. perform degradation b. security issues c. host identification
Supports error detection.

7. 3 measures of data transfer
The packets will be delivered and reassembled at destination.
172.16.192.160
A. goodput b. throughput c. bandwidth
Static

8. Which 2 options represent Layer 4 addressing?
Window Size
It has expanded adressing capabilities.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. identifies the communicating applications b. identifies multiple conversations between the hosts

9. What info is found in the TCP and UDP header info?
Source and Destination Ports
TCP initializes the sequence numbers for the sessions.
To prevent the receiver from being overwhelmed by incoming data.
Binary ANDing

10. What do the intermediary devices in the network do?
Minimal delays in data delivery.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Flash
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

11. statements of IP adressing
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
OTDR
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 address of the router that the host will use to 'get to the other side'.

12. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
RJ-45
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. low overhead b. connectionless

13. 3 features of IPv6
Twisting of the cables
A. larger address space b. data types and classes of service c. authentication and encryption
Next-Hop Address
A. performance degradation b. security issues c. host identification

14. 3 statements about the role of routers in the network
DNS
A. physical layer b. DLL layer
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. non-deterministic b. less overhead c. collisions exist

15. What is the primary purpose of Layer 4?
Originate data flow.
Identify processes or services that are communicating with end devices.
A. MTA b. SMTP
Console interface

16. What type of routing uses information that is manually entered into the routing table?
Static
A. goodput b. throughput c. bandwidth
0 to 1023
Rollover cable

17. When a device is moved from one network to the other...?
A. goodput b. throughput c. bandwidth
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
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. perform degradation b. security issues c. host identification

18. 3 functions of the upper data link sublayer in the OSI model
Static
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. addressing b. error detection c. frame delimiting
It does not support encryption.

19. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
Source and Destination IP address
Network
A. physical layer b. DLL layer

20. What is a default gateway address?

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21. What application layer protocol is used to support file transfers between client and server?
Switch
A. copper UTP b. optical fiber
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
FTP

22. An admin needs to keep contents private - which access method should he use?
SSH
Hub
A. addressing b. error detection c. frame delimiting
A default gateway (router).

23. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. decentralized resources b. resource sharing w/o a dedicated server
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. MTA b. SMTP

24. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. show startup-config b. show running-config
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

25. 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
Network Layer Packet
Source and Destination IP address
A. they initiate data exchanges b. they may upload data to servers
A. the router will discard the packet b. the router will send a time exceeded message to the source host

26. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
Binary ANDing
IP is not properly installed
Collisions can decrease network performance.

27. What is the purpose of the TCP/IP Network Application Layer?
The destination host address.
172.16.192.160
Network Media Control
Destination is not contacted before a packet is sent.

28. What type of network cable is used between a terminal and a console port?
Rollover cable
A. perform degradation b. security issues c. host identification
A. next-hop b. metric/interface c. destination network address
Identify processes or services that are communicating with end devices.

29. What 2 type of cables would most commonly be used for new runs?
Signal loss can be experienced.
A. Cat5 UTP b. Cat6 UTP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Physical

30. What is the purpose of a default gateway?
A. copper UTP b. optical fiber
Identify the device that allows local network computers to communicate w/ devices in other 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. goodput b. throughput c. bandwidth

31. What can get you to an outside network?
A default gateway (router).
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Is a layer of specific encapsulation.

32. 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?
Network
A. show startup-config b. show running-config
Is used by the server to resolve names.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

33. What is the purpose of resource records in DNS?
RJ-45
A. copper UTP b. optical fiber
The physical address is added.
Is used by the server to resolve names.

34. 3 statements about routes and their use
The destination host address.
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. HTTP b. HTTPS
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

35. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
A. non-deterministic b. less overhead c. collisions exist
To facilitate the entry and exit of data on media.
8
A. netstat -r b. route PRINT

36. Statements that describe LAN
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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network Access
Rollover cable

37. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Rollover cable
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
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

38. What command is used to change the default name to 'Costas'?
Logical Link Control sublayer
A random delay helps prevent the stations from experiencing another collision during transmission.
Router(config)# hostname Costas
The packets will be delivered and reassembled at destination.

39. Which type of cable is most often associated w/ fiber-optic cable?
A. router b. firewall
A backbone cable.
Any device whose backoff timer expires first.
The physical address is added.

40. What method of signal transmission uses radio waves to carry signals?
Host mobility
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Wireless
Hosts return to listen-before-transmit mode.

41. 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.
A. goodput b. throughput c. bandwidth
A. non-deterministic b. less overhead c. collisions exist
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

42. What is a component of a routing table entry?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. DNS b. SMTP c. POP
Next-Hop Address
Router(config)# hostname Costas

43. If you have a small network w/ 3 computers...
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. 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
255.255.255.224
Identify processes or services that are communicating with end devices.

44. What are 2 features of User Diagram Protocol (UDP)?
255.255.255.0
DNS
A. low overhead b. connectionless
The magnetic field around the adjacent pairs of wire.

45. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
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
OTDR
UTP

46. What is the role of MTA in handling email?
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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It does not support encryption.

47. Why are port numbers included in the TCP header of a segment?
A. copper UTP b. optical fiber
Console
It uses lasers as the light source.
To enable a receiving host to forward the data to the appropriate application.

48. At which layers of the OSI model does ethernet operate?
Collisions can decrease network performance.
A. minimizing of collisions b. division into broadcast domains
A. physical layer b. DLL layer
Host mobility

49. What is a protocol that provides connectionless network layer services?
IP Protocol
A. minimizing of collisions b. division into broadcast domains
Create signals that represent the bits in each frame for the media.
2046

50. Where is the IOS file stored at?
The address of the router that the host will use to 'get to the other side'.
Network portion
Identify processes or services that are communicating with end devices.
Flash