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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. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
0 to 1023
A default gateway (router).

2. What is the purpose of resource records in DNS?
They must wait until the first hosts finish transfering the media.
A. next-hop b. metric/interface c. destination network address
Is used by the server to resolve names.
A. hot keys b. context-sensitive c. command syntax check

3. 3 functions of the upper data link sublayer in the OSI model
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
Host mobility
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A backbone cable.

4. What does the IEEE 802.2 standard represent in Ethernet technologies?
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Logical Link Control sublayer
Minimal delays in data delivery.

5. Why are port numbers included in the TCP header of a segment?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. netstat -r b. route PRINT
Hub
To enable a receiving host to forward the data to the appropriate application.

6. Statements that describe LAN
A. application b. services
Originate data flow.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

7. Which layer supplies services and allows user interface?
The physical address is added.
Time-to-live (TTL)
Application Layer
A backbone cable.

8. What is a drawback of the CSMA/CD access method?
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
Wireless
Collisions can decrease network performance.
A. servers b. routers c. network printers

9. Which type of cable is most often associated w/ fiber-optic cable?
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 backbone cable.
A. next-hop b. metric/interface c. destination network address
A. HTTP b. HTTPS

10. If you have a full-duplex operational network - what can happen?
255.255.255.0
To enable a receiving host to forward the data to the appropriate application.
No collisions will occur on this link.
Host A

11. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Network Layer Packet
Window Size
A. larger address space b. data types and classes of service c. authentication and encryption
Supports error detection.

12. statements of IP adressing
Destination Network Address
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. copper UTP b. optical fiber
Source and Destination Ports

13. What is the function of the DLL?
Flash
It provides for the exchange of data over a common local media.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Rollover cable

14. 3 primary functions of the data link layer encapsulation
It uses lasers as the light source.
Network address
A. copper UTP b. optical fiber
A. addressing b. error detection c. frame delimiting

15. When a network service fails - which port is most often used to access a router for management purposes?
UTP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. performance degradation b. security issues c. host identification
Console

16. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
RJ-45
TCP initializes the sequence numbers for the sessions.
Collisions can decrease network performance.

17. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. minimizing of collisions b. division into broadcast domains
0 to 1023
Resolve IPv4 addresses to MAC addresses.

18. During a TCP session - if packets arrive out of order - what will happen?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. it has centralized administration b. security is easier to enforce
The packets will be delivered and reassembled at destination.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

19. What are 2 common characteristics associated w/ dynamic routing protocols?
A. DNS b. SMTP c. POP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Is a layer of specific encapsulation.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

20. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Destination Network Address
The address of the router that the host will use to 'get to the other side'.
When connecting a host to a switch.

21. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
They must wait until the first hosts finish transfering the media.
0 to 1023
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
To facilitate the entry and exit of data on media.

22. 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
Show Interfaces
UTP
IP is not properly installed

23. What are the advantages of using a client-server model?
A. physical layer b. DLL layer
The magnetic field around the adjacent pairs of wire.
A. it has centralized administration b. security is easier to enforce
A. copper UTP b. optical fiber

24. What are 3 properties of contention-based media access for a shared media?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. Cat5 UTP b. Cat6 UTP
172.16.192.160
A. non-deterministic b. less overhead c. collisions exist

25. What characteristic of an UTP helps reduce interference?
OTDR
A. addressing b. error detection c. frame delimiting
IP is not properly installed
Twisting of the cables

26. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Fiber
A. replace a switch w/ a router b. subnet the new networks
Hosts return to listen-before-transmit mode.

27. 3 measures of data transfer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
When connecting a host to a switch.
A. goodput b. throughput c. bandwidth
It provides for the exchange of data over a common local media.

28. What can you identify when you examine the Network Layer header?
DNS
172.16.192.160
Router
The destination host address.

29. What is the proper order of the OSI Layers?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
32 bits
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

30. 3 statements about routes and their use
Network Layer Packet
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. low overhead b. connectionless
A. purpose b. geographic location c. ownership

31. 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?
A. show startup-config b. show running-config
Source and Destination IP address
A. Physical b. Data Link
Create signals that represent the bits in each frame for the media.

32. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
It uses support from the lower layers to distinguish between connections to the service.
Network Layer Packet
Wireless
Router(config)# interface FastEthernet 0/1

33. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Time-to-live (TTL)
A. hot keys b. context-sensitive c. command syntax check
Network
SMB

34. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
80 (HTTP)
Host A
255.255.255.0
A random delay helps prevent the stations from experiencing another collision during transmission.

35. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
UTP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Originate data flow.
MAC

36. When is a straight-through cable used in a network?
A. MTA b. SMTP
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
When connecting a host to a switch.
Transport

37. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Network Layer Packet
Flash
A. enable mode b. priviledge executive mode
A. show startup-config b. show running-config

38. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Wireless
Transport
A. flow control b. session establishment c. numbering and sequencing
Router(config)# hostname Costas

39. When destination network is not in the routing table - What are 2 actions the router might take?
It does not support encryption.
32 bits
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. minimizing of collisions b. division into broadcast domains

40. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
DNS
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. DNS b. SMTP c. POP
255.255.255.0

41. There are too many broadcasts on switches - what can be done?
A. enable mode b. priviledge executive mode
DNS
A. replace a switch w/ a router b. subnet the new networks
The physical address is added.

42. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
The MAC protocol can be very simple.
A. router b. firewall
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

43. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
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. low overhead b. connectionless
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
0 to 1023

44. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. flow control b. session establishment c. numbering and sequencing
TCP initializes the sequence numbers for the sessions.
Router(config)# interface FastEthernet 0/1

45. When a device is moved from one network to the other...?
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Twisting of the cables
It does not support encryption.

46. 3 features of IPv6
A default gateway (router).
A. performance degradation b. security issues c. host identification
A. netstat -r b. route PRINT
A. larger address space b. data types and classes of service c. authentication and encryption

47. 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?
TCP initializes the sequence numbers for the sessions.
Host A
Hub
Network Layer Packet

48. 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. purpose b. geographic location c. ownership
A. replace a switch w/ a router b. subnet the new networks
Console

49. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. performance degradation b. security issues c. host identification
A. Physical b. Data Link
A. low overhead b. connectionless

50. What is the purpose of a default gateway?
Source Port
Identify the device that allows local network computers to communicate w/ devices in other networks.
Host mobility
80 (HTTP)