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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. 3 facts about the network portion of an IPv4 address
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
It provides for the exchange of data over a common local media.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Time-to-live (TTL)

2. 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
Create signals that represent the bits in each frame for the media.
DNS
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Network Access

3. 2 most commonly used media types in ethernet networks
255.255.255.224
A. copper UTP b. optical fiber
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

4. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Resolve IPv4 addresses to MAC addresses.
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. DB 60 b. Winchester 15-pin c. smart serial
SMB

5. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
0 to 1023
A. Cat5 UTP b. Cat6 UTP
A. MTA b. SMTP

6. 2 characteristics of clients in data networks
Destination is not contacted before a packet is sent.
A. they initiate data exchanges b. they may upload data to servers
It has expanded adressing capabilities.
A. hot keys b. context-sensitive c. command syntax check

7. 2 characteristics of peer-2-peer
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Rollover cable
A random delay helps prevent the stations from experiencing another collision during transmission.
A. decentralized resources b. resource sharing w/o a dedicated server

8. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
It uses support from the lower layers to distinguish between connections to the service.
Minimal delays in data delivery.
It reduces unnecessary broadcasts.

9. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
Hub
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. physical layer b. DLL layer

10. What can be a problem that is reduced by adding end-to-end addressing?
TCP initializes the sequence numbers for the sessions.
It reduces unnecessary broadcasts.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
IP Protocol

11. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
172.16.192.160
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The address of the router that the host will use to 'get to the other side'.

12. What application layer protocol is used to support file transfers between client and server?
FTP
Collisions can decrease network performance.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Flash

13. What are 2 features of User Diagram Protocol (UDP)?
Originate data flow.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Switch
A. low overhead b. connectionless

14. What layer encapsulates segments into packets?
No collisions will occur on this link.
Network Layer
Host mobility
Destination is not contacted before a packet is sent.

15. What is a drawback of the CSMA/CD access method?
A. minimizing of collisions b. division into broadcast domains
Collisions can decrease network performance.
Ctrl + Shift + 6
Host A

16. Default Gateway is incorrect on the host - What is the impact on the communications?
It has expanded adressing capabilities.
Physical
A. addressing b. error detection c. frame delimiting
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

17. 3 statements about the role of routers in the network
To facilitate the entry and exit of data on media.
Source Port
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
FTP

18. What are 3 common problems w/ large networks?
Host A
A. perform degradation b. security issues c. host identification
Binary ANDing
Destination Network Address

19. What is the purpose of the preamble in an ethernet frame?
A. minimizing of collisions b. division into broadcast domains
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Switch
Network

20. Where is the IOS file stored at?
To enable a receiving host to forward the data to the appropriate application.
Flash
A. media sharing b. logical topology
A. not affected by EMI of RFI b. most expensive type of LAN cabling

21. What determines the method of media access control?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. media sharing b. logical topology
A. hot keys b. context-sensitive c. command syntax check
Host mobility

22. If you have a full-duplex operational network - what can happen?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
32 bits
A. they initiate data exchanges b. they may upload data to servers
No collisions will occur on this link.

23. What is a characteristic of a logical point-to-point topology?
Fiber
The MAC protocol can be very simple.
SSH
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

24. What is a disadvantage of Telnet?
0 to 1023
It does not support encryption.
Network Access
Network Media Control

25. 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?
8
A. physical layer b. DLL layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
80 (HTTP)

26. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. purpose b. geographic location c. ownership
A. larger address space b. data types and classes of service c. authentication and encryption
Transport
Network Layer Packet

27. During a TCP session - if packets arrive out of order - what will happen?
It does not support encryption.
A. enable mode b. priviledge executive mode
The packets will be delivered and reassembled at destination.
Network Media Control

28. What are 2 commands used to view a host routing table?
It reduces unnecessary broadcasts.
A. netstat -r b. route PRINT
The MAC protocol can be very simple.
Fiber

29. 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?
0 to 1023
A. next-hop b. metric/interface c. destination network address
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
They must wait until the first hosts finish transfering the media.

30. What info is found in the TCP and UDP header info?
Minimal delays in data delivery.
Source and Destination Ports
Time-to-live (TTL)
Static

31. At which layers of the OSI model does ethernet operate?
A. HTTP b. HTTPS
A. physical layer b. DLL layer
A. servers b. routers c. network printers
A. copper UTP b. optical fiber

32. What is the purpose of the TCP/IP Network Application Layer?
A. MTA b. SMTP
Network Media Control
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
80 (HTTP)

33. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Host A
A. enable mode b. priviledge executive mode
Router(config)# hostname Costas
A. netstat -r b. route PRINT

34. What do the intermediary devices in the network do?
A. copper UTP b. optical fiber
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
80 (HTTP)
Any device whose backoff timer expires first.

35. During encapsulation - what happens in the Data Link Layer?
When connecting a host to a switch.
32 bits
The physical address is added.
Window Size

36. 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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Transport
A. router b. firewall

37. What causes crosstalk within cable pairs when using UTP?
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 magnetic field around the adjacent pairs of wire.
A. flow control b. session establishment c. numbering and sequencing
A. perform degradation b. security issues c. host identification

38. What is PDU?
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
Is a layer of specific encapsulation.
A. hot keys b. context-sensitive c. command syntax check
A. application b. services

39. How does the application layer on a server process multiple client requests for services?
TCP initializes the sequence numbers for the sessions.
Fiber
Console
It uses support from the lower layers to distinguish between connections to the service.

40. What method of signal transmission uses radio waves to carry signals?
Wireless
Host mobility
It uses support from the lower layers to distinguish between connections to the service.
A. Physical b. Data Link

41. Why is flow control used for TCP data transfer?
A. copper UTP b. optical fiber
A. replace a switch w/ a router b. subnet the new networks
To prevent the receiver from being overwhelmed by incoming data.
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

42. 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
RJ-45
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
SMB

43. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
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
Wireless
Router(config)# interface FastEthernet 0/1
The destination host address.

44. What do end devices do?
A. non-deterministic b. less overhead c. collisions exist
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
Create signals that represent the bits in each frame for the media.

45. What are 2 protocols for transfering web resources?
Source Port
172.16.192.160
A. HTTP b. HTTPS
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

46. What statements describe the logical token-passing topology?
IP is not properly installed
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Rollover cable
A. performance degradation b. security issues c. host identification

47. 3 protocols that operate in the application layer
Hosts return to listen-before-transmit mode.
It does not support encryption.
A. DNS b. SMTP c. POP
Network Layer

48. What are 2 email components used to forward mail between servers?
SSH
Is used by the server to resolve names.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. MTA b. SMTP

49. 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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
80 (HTTP)

50. Important characteristic of UDP
It uses support from the lower layers to distinguish between connections to the service.
Minimal delays in data delivery.
A backbone cable.
Source and Destination Ports