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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 transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
Twisting of the cables
Resolve IPv4 addresses to MAC addresses.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

2. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
The destination host address.
A. it has centralized administration b. security is easier to enforce
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

3. What is the primary function of encapsulating packets into frames?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Console
To facilitate the entry and exit of data on media.
Rollover cable

4. What is the purpose of the TCP/IP Network Application Layer?
Create signals that represent the bits in each frame for the media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Media Control
It provides interface between applications on either end of the network.

5. What information is added during encapsulation at OSI Layer 3?
To enable a receiving host to forward the data to the appropriate application.
Network address
Source and Destination IP address
A. it has centralized administration b. security is easier to enforce

6. What are 3 properties of contention-based media access for a shared media?
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
Binary ANDing
A. replace a switch w/ a router b. subnet the new networks
A. non-deterministic b. less overhead c. collisions exist

7. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network portion
Transport
Physical

8. What does the IEEE 802.2 standard represent in Ethernet technologies?
Identify processes or services that are communicating with end devices.
Logical Link Control sublayer
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Rollover cable

9. 2 characteristics of clients in data networks
Rollover cable
A. they initiate data exchanges b. they may upload data to servers
Identify the device that allows local network computers to communicate w/ devices in other networks.
Ctrl + Shift + 6

10. When a device is moved from one network to the other...?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
The address of the router that the host will use to 'get to the other side'.
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

11. 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 physical topology.
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. show startup-config b. show running-config
Host mobility

12. What is the role of MTA in handling email?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. purpose b. geographic location c. ownership
Network Layer
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

13. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
To enable a receiving host to forward the data to the appropriate application.
No collisions will occur on this link.
Switch
Supports error detection.

14. 2 features that make switches preferable to hubs
It uses support from the lower layers to distinguish between connections to the service.
Host A
Network Media Control
A. minimizing of collisions b. division into broadcast domains

15. What method of signal transmission uses radio waves to carry signals?
Wireless
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Signal loss can be experienced.
A random delay helps prevent the stations from experiencing another collision during transmission.

16. 2 functions of encapsulation
A random delay helps prevent the stations from experiencing another collision during transmission.
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Next-Hop Address

17. What command is used to change the default name to 'Costas'?
Network address
Router(config)# hostname Costas
DNS
Wireless

18. What are 2 common characteristics associated w/ dynamic routing protocols?
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
It provides interface between applications on either end of the network.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
UTP

19. Statements that describe LAN
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
No collisions will occur on this link.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
80 (HTTP)

20. An admin needs to keep contents private - which access method should he use?
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
Resolve IPv4 addresses to MAC addresses.
SSH
FTP

21. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
SMB
Physical
Network address
A. perform degradation b. security issues c. host identification

22. Default Gateway is incorrect on the host - What is the impact on the communications?
Static
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
SMB
A. Physical b. Data Link

23. After an ethernet collision - which device has priority to transmit data?
A. DNS b. SMTP c. POP
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
It reduces unnecessary broadcasts.
Any device whose backoff timer expires first.

24. What are 3 common problems w/ large networks?
A. they initiate data exchanges b. they may upload data to servers
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Router
A. perform degradation b. security issues c. host identification

25. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. minimizing of collisions b. division into broadcast domains
UTP
A random delay helps prevent the stations from experiencing another collision during transmission.
Signal loss can be experienced.

26. Which device is used to create or divide broadcast domains?
The MAC protocol can be very simple.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Source and Destination IP address
Router

27. What is the primary purpose of Layer 4?
IP is not properly installed
A. Cat5 UTP b. Cat6 UTP
Identify processes or services that are communicating with end devices.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

28. What are 2 forms of application layer software?
Create signals that represent the bits in each frame for the media.
A. application b. services
A. router b. firewall
A. identifies the communicating applications b. identifies multiple conversations between the hosts

29. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
IP is not properly installed
Host A
Source Port

30. 3 primary functions of the data link layer encapsulation
Rollover cable
A. addressing b. error detection c. frame delimiting
The address of the router that the host will use to 'get to the other side'.
Network portion

31. Which 2 options represent Layer 4 addressing?
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
Destination is not contacted before a packet is sent.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. performance degradation b. security issues c. host identification

32. How does the application layer on a server process multiple client requests for services?
Source and Destination Ports
It uses support from the lower layers to distinguish between connections to the service.
OTDR
A. router b. firewall

33. What is an effect of improperly applying a network cable connector?
Resolve IPv4 addresses to MAC addresses.
172.16.192.160
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Signal loss can be experienced.

34. 3 statements about routes and their use
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
Binary ANDing
The MAC protocol can be very simple.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

35. What is the primary rope of the physical layer in transmitting data?
Next-Hop Address
Create signals that represent the bits in each frame for the media.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

36. 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
Show Interfaces
A. DB 60 b. Winchester 15-pin c. smart serial
A. DNS b. SMTP c. POP

37. What is the proper order of the OSI Layers?
172.16.192.160
A. application b. presentation c. session d. transmision e. network f. data link g. physical
It uses lasers as the light source.
A. netstat -r b. route PRINT

38. In business LANs - which connector is used w/ twisted-pair networking cable?
Network Media Control
MAC
Console interface
RJ-45

39. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A random delay helps prevent the stations from experiencing another collision during transmission.
255.255.255.224
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
Flash

40. What is a disadvantage of Telnet?
Application Layer
32 bits
It does not support encryption.
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

41. When is a straight-through cable used in a network?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Router
When connecting a host to a switch.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

42. What is the purpose of a default gateway?
A. DB 60 b. Winchester 15-pin c. smart serial
A. identifies the communicating applications b. identifies multiple conversations between the hosts
0 to 1023
Identify the device that allows local network computers to communicate w/ devices in other networks.

43. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Network portion
Source and Destination Ports
They must wait until the first hosts finish transfering the media.

44. What is dinamically selected by the source host when forwarding data?
Source Port
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. performance degradation b. security issues c. host identification
A default gateway (router).

45. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. application b. services
Switch
0 to 1023
To facilitate the entry and exit of data on media.

46. When do changes take effect in a Cisco router?
SSH
As the commands are entered.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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

47. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
A. low overhead b. connectionless
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
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
2046

48. If you have a full-duplex operational network - what can happen?
0 to 1023
Identify processes or services that are communicating with end devices.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
No collisions will occur on this link.

49. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
2046
Hub
A. MTA b. SMTP

50. During encapsulation - what happens in the Data Link Layer?
A. addressing b. error detection c. frame delimiting
A. servers b. routers c. network printers
Source and Destination IP address
The physical address is added.