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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. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
It provides for the exchange of data over a common local media.
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
The packets will be delivered and reassembled at destination.
Fiber

2. 3 statements of media acess control
As the commands are entered.
Any device whose backoff timer expires first.
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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

3. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Source and Destination Ports
IP is not properly installed
Switch
Network Layer Packet

4. What are 2 protocols for transfering web resources?
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
A. HTTP b. HTTPS
Switch
A. enable mode b. priviledge executive mode

5. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Signal loss can be experienced.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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

6. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Is a layer of specific encapsulation.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
UDP
A. perform degradation b. security issues c. host identification

7. When is a straight-through cable used in a network?
A. enable mode b. priviledge executive mode
When connecting a host to a switch.
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
255.255.255.224

8. What application layer protocol is used to support file transfers between client and server?
FTP
Rollover cable
Transport
Hub

9. What determines the method of media access control?
A. netstat -r b. route PRINT
A. media sharing b. logical topology
SSH
A. application b. services

10. What command is used to change the default name to 'Costas'?
A. media sharing b. logical topology
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
Router(config)# hostname Costas
A. physical layer b. DLL layer

11. What is an automated service that matches resource names w/ required IP addresses?
To prevent the receiver from being overwhelmed by incoming data.
A. purpose b. geographic location c. ownership
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
DNS

12. In a connectionless system - What is correct?
IP is not properly installed
A. perform degradation b. security issues c. host identification
A default gateway (router).
Destination is not contacted before a packet is sent.

13. Which characteristics describe fiber optic cable?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
To facilitate the entry and exit of data on media.
A. goodput b. throughput c. bandwidth

14. What is the primary function of encapsulating packets into frames?
It provides interface between applications on either end of the network.
To facilitate the entry and exit of data on media.
A. application b. services
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

15. 3 features that allow TCP to realibly and accurately track the transmission of data
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. flow control b. session establishment c. numbering and sequencing
SSH
A. physical layer b. DLL layer

16. If you have a full-duplex operational network - what can happen?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Fiber
A. goodput b. throughput c. bandwidth
No collisions will occur on this link.

17. 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
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. purpose b. geographic location c. ownership
Window Size

18. What are 3 common problems w/ large networks?
Resolve IPv4 addresses to MAC addresses.
A. perform degradation b. security issues c. host identification
IP Protocol
No collisions will occur on this link.

19. 3 measures of data transfer
Host mobility
TCP initializes the sequence numbers for the sessions.
A. performance degradation b. security issues c. host identification
A. goodput b. throughput c. bandwidth

20. What are 2 forms of application layer software?
Is a layer of specific encapsulation.
A. show startup-config b. show running-config
32 bits
A. application b. services

21. There are too many broadcasts on switches - what can be done?
RJ-45
A random delay helps prevent the stations from experiencing another collision during transmission.
A. replace a switch w/ a router b. subnet the new networks
Destination Network Address

22. After an ethernet collision - which device has priority to transmit data?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
RJ-45
Any device whose backoff timer expires first.
A. hot keys b. context-sensitive c. command syntax check

23. 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
A. non-deterministic b. less overhead c. collisions exist
A. replace a switch w/ a router b. subnet the new networks
2046

24. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
Identify processes or services that are communicating with end devices.
Time-to-live (TTL)
The destination host address.

25. What is the role of MTA in handling email?
A. MTA b. SMTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Network
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

26. How many bits make up an IPv4 address?
32 bits
A. show startup-config b. show running-config
A. Physical b. Data Link
A. decentralized resources b. resource sharing w/o a dedicated server

27. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
A. MTA b. SMTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Console

28. What is the function of the DLL?
The address of the router that the host will use to 'get to the other side'.
It provides for the exchange of data over a common local media.
Identify processes or services that are communicating with end devices.
A. netstat -r b. route PRINT

29. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Destination Network Address
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

30. Intermediary devices used to implement security between networks
Host mobility
Signal loss can be experienced.
A. router b. firewall
Identify the device that allows local network computers to communicate w/ devices in other networks.

31. In business LANs - which connector is used w/ twisted-pair networking cable?
Switch
RJ-45
A. DB 60 b. Winchester 15-pin c. smart serial
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

32. What command can be used to determine if the router has experienced any input or output errors?
A backbone cable.
It reduces unnecessary broadcasts.
Show Interfaces
The magnetic field around the adjacent pairs of wire.

33. What are 2 email components used to forward mail between servers?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
255.255.255.224
It provides interface between applications on either end of the network.
A. MTA b. SMTP

34. What type of routing uses information that is manually entered into the routing table?
It uses support from the lower layers to distinguish between connections to the service.
Static
Window Size
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

35. When do changes take effect in a Cisco router?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
As the commands are entered.
Transport
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

36. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Is used by the server to resolve names.
A. larger address space b. data types and classes of service c. authentication and encryption
Hosts return to listen-before-transmit mode.
A random delay helps prevent the stations from experiencing another collision during transmission.

37. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
It reduces unnecessary broadcasts.
A. DNS b. SMTP c. POP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

38. 2 characteristics of peer-2-peer
Identify processes or services that are communicating with end devices.
A. DB 60 b. Winchester 15-pin c. smart serial
A. DNS b. SMTP c. POP
A. decentralized resources b. resource sharing w/o a dedicated server

39. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Minimal delays in data delivery.
255.255.255.224
MAC
To enable a receiving host to forward the data to the appropriate application.

40. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Wireless
It has expanded adressing capabilities.
A. purpose b. geographic location c. ownership

41. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
0 to 1023
It uses support from the lower layers to distinguish between connections to the service.
It provides interface between applications on either end of the network.

42. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
A. low overhead b. connectionless
IP is not properly installed
2046

43. Default Gateway is incorrect on the host - What is the impact on the communications?
Originate data flow.
Fiber
32 bits
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

44. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A default gateway (router).
Transport
Fiber
Router(config)# hostname Costas

45. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
A. decentralized resources b. resource sharing w/o a dedicated server
Destination is not contacted before a packet is sent.
A. HTTP b. HTTPS

46. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
To facilitate the entry and exit of data on media.
Router
Fiber

47. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. minimizing of collisions b. division into broadcast domains
Collisions can decrease network performance.
Minimal delays in data delivery.

48. 3 functions of the upper data link sublayer in the OSI model
Create signals that represent the bits in each frame for the media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

49. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
Network
UTP
8

50. What describes the purpose of default route?
MAC
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
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
The MAC protocol can be very simple.