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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 layer supplies services and allows user interface?
Application Layer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
DNS
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

2. What are 2 commands used to view a host routing table?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. netstat -r b. route PRINT
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

3. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A backbone cable.
Application Layer
A. netstat -r b. route PRINT

4. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
It does not support encryption.
Rollover cable
Network Access

5. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Identify processes or services that are communicating with end devices.
Network address
Is used by the server to resolve names.

6. What is a default gateway address?

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7. 3 properties of peer-2-peer applications
2046
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
RJ-45
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

8. When is a straight-through cable used in a network?
Router
When connecting a host to a switch.
2046
Resolve IPv4 addresses to MAC addresses.

9. What command can be used to determine if the router has experienced any input or output errors?
UDP
A. next-hop b. metric/interface c. destination network address
A. copper UTP b. optical fiber
Show Interfaces

10. There are too many broadcasts on switches - what can be done?
2046
Hosts return to listen-before-transmit mode.
A. replace a switch w/ a router b. subnet the new networks
A. netstat -r b. route PRINT

11. What correctly describes a MAC address?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
80 (HTTP)

12. What are 2 forms of application layer software?
A. application b. services
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network portion
Rollover cable

13. What is the purpose of resource records in DNS?
A. application b. services
Is used by the server to resolve names.
Any device whose backoff timer expires first.
A. replace a switch w/ a router b. subnet the new networks

14. What are 2 common characteristics associated w/ dynamic routing protocols?
TCP initializes the sequence numbers for the sessions.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Destination Network Address

15. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. addressing b. error detection c. frame delimiting
UDP
A. the router will discard the packet b. the router will send a time exceeded message to the source host

16. 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?
Originate data flow.
Show Interfaces
Rollover cable
172.16.192.160

17. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
Next-Hop Address
A. application b. presentation c. session d. transmision e. network f. data link g. physical
It uses lasers as the light source.

18. What are 2 features of User Diagram Protocol (UDP)?
Ctrl + Shift + 6
2046
A. low overhead b. connectionless
Network

19. What 2 type of cables would most commonly be used for new runs?
Minimal delays in data delivery.
Network
A. Cat5 UTP b. Cat6 UTP
The physical address is added.

20. What is the function of the DLL?
0 to 1023
It provides for the exchange of data over a common local media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

21. Which combination of keys can be used to interrupt a ping or traceroute process?
The magnetic field around the adjacent pairs of wire.
A. replace a switch w/ a router b. subnet the new networks
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Ctrl + Shift + 6

22. Where is the IOS file stored at?
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
A. application b. services
Flash

23. What device can check for faults - integrity and performance of media?
Ctrl + Shift + 6
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
OTDR
32 bits

24. What is PDU?
RJ-45
2046
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Is a layer of specific encapsulation.

25. 3 features that allow TCP to realibly and accurately track the transmission of data
Source and Destination Ports
A default gateway (router).
A. flow control b. session establishment c. numbering and sequencing
UDP

26. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
The destination host address.
Wireless
IP is not properly installed
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

27. If you have a small network w/ 3 computers...
Physical
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. MTA b. SMTP
Identify the device that allows local network computers to communicate w/ devices in other networks.

28. Which IP packet field will prevent endless loops?
When connecting a host to a switch.
Console
Rollover cable
Time-to-live (TTL)

29. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
Network address
Is a layer of specific encapsulation.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

30. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Rollover cable
A. enable mode b. priviledge executive mode
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

31. 3 terms that define the forms of help available within the Cisco IOS
Identify processes or services that are communicating with end devices.
A. hot keys b. context-sensitive c. command syntax check
Network Access
The destination host address.

32. What does the IEEE 802.2 standard represent in Ethernet technologies?
It uses support from the lower layers to distinguish between connections to the service.
A backbone cable.
Logical Link Control sublayer
Resolve IPv4 addresses to MAC addresses.

33. 3 protocols that operate in the application layer
The MAC protocol can be very simple.
A. decentralized resources b. resource sharing w/o a dedicated server
A. DNS b. SMTP c. POP
To enable a receiving host to forward the data to the appropriate application.

34. 2 functions of encapsulation
A. it has centralized administration b. security is easier to enforce
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Application Layer

35. What do you need to use for an initial configuration on a Cisco router?
Logical Link Control sublayer
Network
Hosts return to listen-before-transmit mode.
Console interface

36. What is an effect of improperly applying a network cable connector?
A. physical layer b. DLL layer
OTDR
Wireless
Signal loss can be experienced.

37. In business LANs - which connector is used w/ twisted-pair networking cable?
A. decentralized resources b. resource sharing w/o a dedicated server
A default gateway (router).
RJ-45
A. goodput b. throughput c. bandwidth

38. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
It provides interface between applications on either end of the network.
FTP
Router(config)# hostname Costas
Network address

39. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
No collisions will occur on this link.
Physical
Collisions can decrease network performance.

40. How does the application layer on a server process multiple client requests for services?
A backbone cable.
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. perform degradation b. security issues c. host identification
It uses support from the lower layers to distinguish between connections to the service.

41. What is a characteristic of a single-mode fiber-optic cable?
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
UDP
Is used by the server to resolve names.
It uses lasers as the light source.

42. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
It uses support from the lower layers to distinguish between connections to the service.
Window Size
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

43. 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
Host A
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. purpose b. geographic location c. ownership

44. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. performance degradation b. security issues c. host identification
Network Layer Packet
It uses support from the lower layers to distinguish between connections to the service.
A. purpose b. geographic location c. ownership

45. 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
A. the router will discard the packet b. the router will send a time exceeded message to the source host
It does not support encryption.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
RJ-45

46. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. DB 60 b. Winchester 15-pin c. smart serial
A. performance degradation b. security issues c. host identification
MAC
Network

47. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Flash
Time-to-live (TTL)
DNS

48. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
SSH
RJ-45

49. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
The address of the router that the host will use to 'get to the other side'.
Rollover cable

50. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. low overhead b. connectionless
Hub
As the commands are entered.
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