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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. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
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
Is a layer of specific encapsulation.
Transport
A. router b. firewall

2. What determines the method of media access control?
A. media sharing b. logical topology
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Hosts return to listen-before-transmit mode.

3. What is a characteristic of a single-mode fiber-optic cable?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
To facilitate the entry and exit of data on media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
It uses lasers as the light source.

4. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
MAC
They must wait until the first hosts finish transfering the media.
Hub

5. After an ethernet collision - which device has priority to transmit data?
It does not support encryption.
Next-Hop Address
Any device whose backoff timer expires first.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

6. 3 statements about routes and their use
To enable a receiving host to forward the data to the appropriate application.
Router(config)# interface FastEthernet 0/1
A. MTA b. SMTP
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

7. An admin needs to keep contents private - which access method should he use?
It does not support encryption.
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.
SSH

8. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
Rollover cable
A backbone cable.
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
172.16.192.160

9. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
255.255.255.0
A. flow control b. session establishment c. numbering and sequencing
A. servers b. routers c. network printers
A. enable mode b. priviledge executive mode

10. What application layer protocol is used to support file transfers between client and server?
FTP
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. decentralized resources b. resource sharing w/o a dedicated server
Destination Network Address

11. What is an automated service that matches resource names w/ required IP addresses?
Source Port
Host mobility
DNS
Supports error detection.

12. What characteristic of an UTP helps reduce interference?
Twisting of the cables
A physical topology.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
255.255.255.0

13. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. non-deterministic b. less overhead c. collisions exist
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# interface FastEthernet 0/1
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

14. What are key considering factors when grouping hosts into common networks?
Host mobility
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
A. purpose b. geographic location c. ownership

15. 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
Router(config)# hostname Costas
It provides for the exchange of data over a common local media.
When connecting a host to a switch.

16. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
It reduces unnecessary broadcasts.
Time-to-live (TTL)
It uses lasers as the light source.

17. In business LANs - which connector is used w/ twisted-pair networking cable?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
RJ-45
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

18. 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?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
2046
Collisions can decrease network performance.
They must wait until the first hosts finish transfering the media.

19. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Network address
Identify the device that allows local network computers to communicate w/ devices in other networks.
The destination host address.

20. What is a component of a routing table entry?
To enable a receiving host to forward the data to the appropriate application.
Identify processes or services that are communicating with end devices.
TCP initializes the sequence numbers for the sessions.
Next-Hop Address

21. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

22. What kind of problems are caused by excessive broadcast traffic on network segments?
To enable a receiving host to forward the data to the appropriate application.
A. show startup-config b. show running-config
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. DNS b. SMTP c. POP

23. 3 statements of media acess control
Static
SMB
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. replace a switch w/ a router b. subnet the new networks

24. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
172.16.192.160
UDP
Supports error detection.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

25. What can you identify when you examine the Network Layer header?
Show Interfaces
UTP
The destination host address.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

26. When do changes take effect in a Cisco router?
Identify processes or services that are communicating with end devices.
Network Access
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
As the commands are entered.

27. 3 primary functions of the data link layer encapsulation
A. DNS b. SMTP c. POP
A. addressing b. error detection c. frame delimiting
A. low overhead b. connectionless
Rollover cable

28. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
8
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. flow control b. session establishment c. numbering and sequencing

29. 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
Network Media Control
80 (HTTP)
Switch

30. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
32 bits
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. addressing b. error detection c. frame delimiting

31. 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
Time-to-live (TTL)
Is a layer of specific encapsulation.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

32. What command is used to change the default name to 'Costas'?
A physical topology.
Router(config)# hostname Costas
Rollover cable
Network

33. What are 3 pieces of info about a route contained in a routing table?
They must wait until the first hosts finish transfering the media.
Hub
0 to 1023
A. next-hop b. metric/interface c. destination network address

34. What is dinamically selected by the source host when forwarding data?
A. enable mode b. priviledge executive mode
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. decentralized resources b. resource sharing w/o a dedicated server
Source Port

35. 2 functions of encapsulation
A. Cat5 UTP b. Cat6 UTP
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
Any device whose backoff timer expires first.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

36. What info is found in the TCP and UDP header info?
Source and Destination Ports
Static
A. replace a switch w/ a router b. subnet the new networks
The magnetic field around the adjacent pairs of wire.

37. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
Network Layer Packet
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. they initiate data exchanges b. they may upload data to servers

38. What is the function of the DLL?
A. netstat -r b. route PRINT
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Identify the device that allows local network computers to communicate w/ devices in other networks.
It provides for the exchange of data over a common local media.

39. What is a disadvantage of Telnet?
A. non-deterministic b. less overhead c. collisions exist
It does not support encryption.
A. application b. services
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

40. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. copper UTP b. optical fiber
A. media sharing b. logical topology
SMB
A. flow control b. session establishment c. numbering and sequencing

41. What do the intermediary devices in the network do?
255.255.255.0
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
MAC

42. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
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
The address of the router that the host will use to 'get to the other side'.
It reduces unnecessary broadcasts.

43. 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?
Network address
8
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

44. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. enable mode b. priviledge executive mode
OTDR
A. the router will discard the packet b. the router will send a time exceeded message to the source host

45. Statements that describe LAN
Console
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. MTA b. SMTP

46. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
8
255.255.255.0
Twisting of the cables

47. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
Network Access
The physical address is added.
Fiber

48. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
OTDR
Supports error detection.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

49. What is the purpose of the preamble in an ethernet frame?
A. larger address space b. data types and classes of service c. authentication and encryption
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Wireless
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

50. If there is a graphic representation of a company network wiring and equipment - What is this called?
To enable a receiving host to forward the data to the appropriate application.
The destination host address.
Minimal delays in data delivery.
A physical topology.