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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. What 2 type of cables would most commonly be used for new runs?
A. perform degradation b. security issues c. host identification
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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. Cat5 UTP b. Cat6 UTP

2. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
A. netstat -r b. route PRINT
8
Network Layer Packet

3. What is a disadvantage of Telnet?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. identifies the communicating applications b. identifies multiple conversations between the hosts
The MAC protocol can be very simple.
It does not support encryption.

4. What makes fiber preferable to copper for interconnecting buildings?
The magnetic field around the adjacent pairs of wire.
Transport
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Switch

5. What event occurs during the 3-way handshake?
A. decentralized resources b. resource sharing w/o a dedicated server
TCP initializes the sequence numbers for the sessions.
It does not support encryption.
A. it has centralized administration b. security is easier to enforce

6. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. larger address space b. data types and classes of service c. authentication and encryption
2046
SSH

7. In a connectionless system - What is correct?
A. router b. firewall
Destination is not contacted before a packet is sent.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It uses support from the lower layers to distinguish between connections to the service.

8. Which 2 options represent Layer 4 addressing?
Binary ANDing
Switch
Router(config)# hostname Costas
A. identifies the communicating applications b. identifies multiple conversations between the hosts

9. There are too many broadcasts on switches - what can be done?
The address of the router that the host will use to 'get to the other side'.
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. replace a switch w/ a router b. subnet the new networks
Fiber

10. 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?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. next-hop b. metric/interface c. destination network address
A. Cat5 UTP b. Cat6 UTP
A. show startup-config b. show running-config

11. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Destination is not contacted before a packet is sent.
Transport
It uses support from the lower layers to distinguish between connections to the service.
A. non-deterministic b. less overhead c. collisions exist

12. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Console interface
Rollover cable
A. perform degradation b. security issues c. host identification

13. What can be a problem that is reduced by adding end-to-end addressing?
Source and Destination Ports
It reduces unnecessary broadcasts.
A. application b. services
Network Layer

14. Which characteristics describe fiber optic cable?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Router(config)# hostname Costas
Source and Destination IP address

15. What is the function of the DLL?
Ctrl + Shift + 6
80 (HTTP)
To prevent the receiver from being overwhelmed by incoming data.
It provides for the exchange of data over a common local media.

16. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Source Port
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
32 bits
A. media sharing b. logical topology

17. Which IP packet field will prevent endless loops?
Fiber
Time-to-live (TTL)
Destination is not contacted before a packet is sent.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

18. What do the intermediary devices in the network do?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Host A
The magnetic field around the adjacent pairs of wire.

19. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
Source Port
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
Ctrl + Shift + 6

20. 2 characteristics of clients in data networks
Time-to-live (TTL)
Source and Destination IP address
Destination is not contacted before a packet is sent.
A. they initiate data exchanges b. they may upload data to servers

21. 3 factors that should be considered when implementing Layer 2 protocols
Flash
Console interface
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
172.16.192.160

22. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
A. servers b. routers c. network printers
Source and Destination Ports
A. HTTP b. HTTPS

23. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Destination Network Address
UTP
A. it has centralized administration b. security is easier to enforce
A. identifies the communicating applications b. identifies multiple conversations between the hosts

24. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It reduces unnecessary broadcasts.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

25. 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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
Console interface
2046
Wireless

26. What is the primary purpose of ARP?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Resolve IPv4 addresses to MAC addresses.
UDP
Host A

27. statements of IP adressing
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
Signal loss can be experienced.
SMB
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

28. 3 properties of peer-2-peer applications
SSH
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
DNS
Destination Network Address

29. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. media sharing b. logical topology
Next-Hop Address
A. enable mode b. priviledge executive mode
Identify processes or services that are communicating with end devices.

30. What is the role of the OSI Application Layer?
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
It provides interface between applications on either end of the network.
A default gateway (router).
A backbone cable.

31. 3 functions of the upper data link sublayer in the OSI model
Twisting of the cables
Router(config)# hostname Costas
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. low overhead b. connectionless

32. If you have a full-duplex operational network - what can happen?
A. netstat -r b. route PRINT
No collisions will occur on this link.
Destination Network Address
A. it has centralized administration b. security is easier to enforce

33. What is a default gateway address?

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34. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
It provides interface between applications on either end of the network.
Rollover cable
2046
255.255.255.0

35. What is the proper order of the OSI Layers?
Network Layer
8
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. replace a switch w/ a router b. subnet the new networks

36. What determines the method of media access control?
255.255.255.0
MAC
A. media sharing b. logical topology
DNS

37. Which layer supplies services and allows user interface?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. non-deterministic b. less overhead c. collisions exist
Application Layer
To enable a receiving host to forward the data to the appropriate application.

38. What is an effect of improperly applying a network cable connector?
A default gateway (router).
Network Media Control
Signal loss can be experienced.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

39. When is a straight-through cable used in a network?
When connecting a host to a switch.
A. decentralized resources b. resource sharing w/o a dedicated server
UTP
Network

40. What is a drawback of the CSMA/CD access method?
8
A. physical layer b. DLL layer
A. MTA b. SMTP
Collisions can decrease network performance.

41. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Hub
It reduces unnecessary broadcasts.
A. Physical b. Data Link

42. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Logical Link Control sublayer
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Destination Network Address
A. router b. firewall

43. What are 2 features of User Diagram Protocol (UDP)?
A physical topology.
As the commands are entered.
A. low overhead b. connectionless
A. application b. services

44. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
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. replace a switch w/ a router b. subnet the new networks
The destination host address.

45. Default Gateway is incorrect on the host - What is the impact on the communications?
Rollover cable
Any device whose backoff timer expires first.
Signal loss can be experienced.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

46. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
255.255.255.224
80 (HTTP)
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

47. Intermediary devices used to implement security between networks
Rollover cable
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
OTDR
A. router b. firewall

48. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
The destination host address.
A. DB 60 b. Winchester 15-pin c. smart serial
Minimal delays in data delivery.

49. Which portion of the network layer address does a router use to forward packets?
SSH
When connecting a host to a switch.
Network Access
Network portion

50. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Fiber
A. router b. firewall
A. copper UTP b. optical fiber