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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. Important characteristic of UDP
Minimal delays in data delivery.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
MAC
UDP

2. To make a console connection from a comp to a Cisco router - what cable should be used?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It uses support from the lower layers to distinguish between connections to the service.
Signal loss can be experienced.
Rollover cable

3. What are 3 pieces of info about a route contained in a routing table?
Network Media Control
32 bits
A. next-hop b. metric/interface c. destination network address
A. they initiate data exchanges b. they may upload data to servers

4. During encapsulation - what happens in the Data Link Layer?
Is a layer of specific encapsulation.
Network Media Control
Network Layer
The physical address is added.

5. 3 measures of data transfer
A. they initiate data exchanges b. they may upload data to servers
Application Layer
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. goodput b. throughput c. bandwidth

6. How many bits make up an IPv4 address?
32 bits
It provides for the exchange of data over a common local media.
Router(config)# hostname Costas
80 (HTTP)

7. 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. the router will discard the packet b. the router will send a time exceeded message to the source host
A. application b. services
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

8. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
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. media sharing b. logical topology
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

9. What is a characteristic of a logical point-to-point topology?
Console
To facilitate the entry and exit of data on media.
A. DB 60 b. Winchester 15-pin c. smart serial
The MAC protocol can be very simple.

10. 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?
Transport
2046
32 bits
They must wait until the first hosts finish transfering the media.

11. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
Router
A. goodput b. throughput c. bandwidth
Create signals that represent the bits in each frame for the media.

12. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. decentralized resources b. resource sharing w/o a dedicated server
As the commands are entered.
255.255.255.224
A. larger address space b. data types and classes of service c. authentication and encryption

13. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
SSH
MAC
UTP
Router(config)# interface FastEthernet 0/1

14. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
Host mobility
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
SSH

15. There are too many broadcasts on switches - what can be done?
Router(config)# interface FastEthernet 0/1
A. replace a switch w/ a router b. subnet the new networks
Originate data flow.
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

16. What is a benefit of a WAN?
DNS
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. DNS b. SMTP c. POP

17. What can be a problem that is reduced by adding end-to-end addressing?
Show Interfaces
Network Media Control
It reduces unnecessary broadcasts.
Static

18. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Flash
A. performance degradation b. security issues c. host identification
To prevent the receiver from being overwhelmed by incoming data.
Network Layer Packet

19. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Router(config)# hostname Costas
A. purpose b. geographic location c. ownership
Identify processes or services that are communicating with end devices.

20. What is the purpose of the preamble in an ethernet frame?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A physical topology.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

21. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. it has centralized administration b. security is easier to enforce
DNS
When connecting a host to a switch.

22. What do end devices do?
Originate data flow.
Create signals that represent the bits in each frame for the media.
A. DNS b. SMTP c. POP
Collisions can decrease network performance.

23. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
A. netstat -r b. route PRINT
A. media sharing b. logical topology
A. minimizing of collisions b. division into broadcast domains

24. What makes fiber preferable to copper for interconnecting buildings?
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Flash

25. Which portion of the network layer address does a router use to forward packets?
A. it has centralized administration b. security is easier to enforce
Network portion
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Minimal delays in data delivery.

26. 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.
UTP
A. addressing b. error detection c. frame delimiting
80 (HTTP)

27. Which type of cable is most often associated w/ fiber-optic cable?
A. minimizing of collisions b. division into broadcast domains
The destination host address.
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.

28. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
A. media sharing b. logical topology
A. replace a switch w/ a router b. subnet the new networks
It does not support encryption.

29. What is the primary purpose of ARP?
Router
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
Resolve IPv4 addresses to MAC addresses.

30. 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 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. 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. the router will discard the packet b. the router will send a time exceeded message to the source host
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

31. Which 2 options represent Layer 4 addressing?
The physical address is added.
The magnetic field around the adjacent pairs of wire.
A backbone cable.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

32. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Transport
The destination host address.
A. servers b. routers c. network printers
A. DB 60 b. Winchester 15-pin c. smart serial

33. What can you identify when you examine the Network Layer header?
Network
8
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
The destination host address.

34. What is an effect of improperly applying a network cable connector?
2046
Source and Destination IP address
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
Signal loss can be experienced.

35. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
A. next-hop b. metric/interface c. destination network address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
To enable a receiving host to forward the data to the appropriate application.

36. After an ethernet collision - which device has priority to transmit data?
Originate data flow.
Any device whose backoff timer expires first.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
UTP

37. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
It provides interface between applications on either end of the network.
A. hot keys b. context-sensitive c. command syntax check
A. the router will discard the packet b. the router will send a time exceeded message to the source host

38. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
Flash
Resolve IPv4 addresses to MAC addresses.
A. perform degradation b. security issues c. host identification

39. An admin needs to keep contents private - which access method should he use?
SSH
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. show startup-config b. show running-config
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

40. What is the purpose of a default gateway?
Rollover cable
Any device whose backoff timer expires first.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. DNS b. SMTP c. POP

41. Which combination of keys can be used to interrupt a ping or traceroute process?
The magnetic field around the adjacent pairs of wire.
Ctrl + Shift + 6
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. low overhead b. connectionless

42. Why are port numbers included in the TCP header of a segment?
A. addressing b. error detection c. frame delimiting
A. decentralized resources b. resource sharing w/o a dedicated server
Destination Network Address
To enable a receiving host to forward the data to the appropriate application.

43. 3 functions of the upper data link sublayer in the OSI model
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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. it has centralized administration b. security is easier to enforce
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

44. What layer encapsulates segments into packets?
Window Size
A default gateway (router).
Network Layer
Console

45. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Originate data flow.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Show Interfaces

46. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
MAC

47. What are 2 common characteristics associated w/ dynamic routing protocols?
A. media sharing b. logical topology
Physical
A. netstat -r b. route PRINT
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

48. What correctly describes a MAC address?
Is used by the server to resolve names.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Console interface
A. next-hop b. metric/interface c. destination network address

49. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
RJ-45
A. router b. firewall
A. media sharing b. logical topology

50. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A. hot keys b. context-sensitive c. command syntax check
A. router b. firewall
Physical