Test your basic knowledge |

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 is a benefit of a WAN?
IP is not properly installed
When connecting a host to a switch.
Host mobility
Network address

2. To make a console connection from a comp to a Cisco router - what cable should be used?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Rollover cable
Hosts return to listen-before-transmit mode.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

3. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
It uses support from the lower layers to distinguish between connections to the service.
Twisting of the cables
Window Size
Application Layer

4. 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
Host mobility
A. router b. firewall
A. the router will discard the packet b. the router will send a time exceeded message to the source host
80 (HTTP)

5. In business LANs - which connector is used w/ twisted-pair networking cable?
A. low overhead b. connectionless
To prevent the receiver from being overwhelmed by incoming data.
Network Media Control
RJ-45

6. When do changes take effect in a Cisco router?
Fiber
As the commands are entered.
It provides interface between applications on either end of the network.
Destination Network Address

7. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Hub
A. media sharing b. logical topology
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

8. An admin needs to keep contents private - which access method should he use?
SSH
A. physical layer b. DLL layer
Destination is not contacted before a packet is sent.
Rollover cable

9. Which 2 options represent Layer 4 addressing?
FTP
Supports error detection.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. identifies the communicating applications b. identifies multiple conversations between the hosts

10. 3 facts about the network portion of an IPv4 address
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Is used by the server to resolve names.
A. enable mode b. priviledge executive mode

11. What are 2 forms of application layer software?
0 to 1023
Network Layer Packet
They must wait until the first hosts finish transfering the media.
A. application b. services

12. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Is a layer of specific encapsulation.
Network
The destination host address.

13. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Logical Link Control sublayer
IP Protocol

14. What is an effect of improperly applying a network cable connector?
A. goodput b. throughput c. bandwidth
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Signal loss can be experienced.
A. copper UTP b. optical fiber

15. What are 3 properties of contention-based media access for a shared media?
To enable a receiving host to forward the data to the appropriate application.
A. non-deterministic b. less overhead c. collisions exist
It uses lasers as the light source.
A. replace a switch w/ a router b. subnet the new networks

16. When a network service fails - which port is most often used to access a router for management purposes?
Create signals that represent the bits in each frame for the media.
Rollover cable
Console
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

17. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host mobility

18. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Time-to-live (TTL)
A. Physical b. Data Link
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
Next-Hop Address

19. 3 protocols that operate in the application layer
A. flow control b. session establishment c. numbering and sequencing
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. DNS b. SMTP c. POP
It uses support from the lower layers to distinguish between connections to the service.

20. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
They must wait until the first hosts finish transfering the media.
A. replace a switch w/ a router b. subnet the new networks
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

21. What type of network cable is used between a terminal and a console port?
The MAC protocol can be very simple.
Rollover cable
A random delay helps prevent the stations from experiencing another collision during transmission.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

22. At which layers of the OSI model does ethernet operate?
Flash
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. physical layer b. DLL layer
It does not support encryption.

23. 2 characteristics of clients in data networks
Physical
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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. they initiate data exchanges b. they may upload data to servers

24. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
The MAC protocol can be very simple.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

25. 3 properties of peer-2-peer applications
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
SMB
Collisions can decrease network performance.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

26. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Binary ANDing
Identify the device that allows local network computers to communicate w/ devices in other networks.
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

27. What is the proper order of the OSI Layers?
Wireless
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Signal loss can be experienced.

28. Why is flow control used for TCP data transfer?
It provides for the exchange of data over a common local media.
A default gateway (router).
Switch
To prevent the receiver from being overwhelmed by incoming data.

29. 2 most commonly used media types in ethernet networks
SMB
DNS
32 bits
A. copper UTP b. optical fiber

30. If you have a small network w/ 3 computers...
The destination host address.
0 to 1023
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. application b. services

31. What layer encapsulates segments into packets?
Destination Network Address
A. application b. services
Network Layer
A. minimizing of collisions b. division into broadcast domains

32. 3 features of IPv6
A. minimizing of collisions b. division into broadcast domains
A. larger address space b. data types and classes of service c. authentication and encryption
A. physical layer b. DLL layer
Any device whose backoff timer expires first.

33. What determines the method of media access control?
Host mobility
A. media sharing b. logical topology
A. physical layer b. DLL layer
Source and Destination IP address

34. What can you identify when you examine the Network Layer header?
Network Layer
The destination host address.
A. application b. services
IP Protocol

35. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. larger address space b. data types and classes of service c. authentication and encryption
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Application Layer

36. Which characteristics describe fiber optic cable?
A. router b. firewall
To enable a receiving host to forward the data to the appropriate application.
A. flow control b. session establishment c. numbering and sequencing
A. not affected by EMI of RFI b. most expensive type of LAN cabling

37. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. application b. services
UDP
Time-to-live (TTL)

38. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Switch
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Destination Network Address
Resolve IPv4 addresses to MAC addresses.

39. Intermediary devices used to implement security between networks
A. router b. firewall
The destination host address.
Flash
They must wait until the first hosts finish transfering the media.

40. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Hosts return to listen-before-transmit mode.
Flash
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

41. 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?
2046
A. replace a switch w/ a router b. subnet the new networks
A. DNS b. SMTP c. POP
Binary ANDing

42. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
Next-Hop Address
Is a layer of specific encapsulation.
A. larger address space b. data types and classes of service c. authentication and encryption

43. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Source and Destination IP address
Transport
Time-to-live (TTL)
To facilitate the entry and exit of data on media.

44. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. show startup-config b. show running-config
IP Protocol
A. enable mode b. priviledge executive mode

45. Important characteristic of UDP
A. copper UTP b. optical fiber
It reduces unnecessary broadcasts.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Minimal delays in data delivery.

46. What are key considering factors when grouping hosts into common networks?
Is used by the server to resolve names.
Next-Hop Address
A. purpose b. geographic location c. ownership
A. replace a switch w/ a router b. subnet the new networks

47. What are 2 common characteristics associated w/ dynamic routing protocols?
Minimal delays in data delivery.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. performance degradation b. security issues c. host identification
It provides interface between applications on either end of the network.

48. What is a protocol that provides connectionless network layer services?
IP Protocol
Collisions can decrease network performance.
Source and Destination Ports
Host mobility

49. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
To facilitate the entry and exit of data on media.
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
They must wait until the first hosts finish transfering the media.

50. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. it has centralized administration b. security is easier to enforce
Network Access
The magnetic field around the adjacent pairs of wire.