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?
Host mobility
A. larger address space b. data types and classes of service c. authentication and encryption
No collisions will occur on this link.
172.16.192.160

2. What application layer protocol is used to support file transfers between client and server?
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. larger address space b. data types and classes of service c. authentication and encryption
FTP
A backbone cable.

3. What is the purpose of the preamble in an ethernet frame?
A. MTA b. SMTP
The destination host address.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

4. What causes crosstalk within cable pairs when using UTP?
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
Router(config)# interface FastEthernet 0/1
The magnetic field around the adjacent pairs of wire.
They must wait until the first hosts finish transfering the media.

5. How does the application layer on a server process multiple client requests for services?
A. larger address space b. data types and classes of service c. authentication and encryption
It uses support from the lower layers to distinguish between connections to the service.
MAC
Flash

6. 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
2046
A. next-hop b. metric/interface c. destination network address
A. minimizing of collisions b. division into broadcast domains
A. the router will discard the packet b. the router will send a time exceeded message to the source host

7. What are 2 protocols for transfering web resources?
Rollover cable
A. performance degradation b. security issues c. host identification
A. HTTP b. HTTPS
Identify processes or services that are communicating with end devices.

8. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
When connecting a host to a switch.
The packets will be delivered and reassembled at destination.
UTP
Router

9. What can you identify when you examine the Network Layer header?
Source and Destination Ports
A default gateway (router).
The physical address is added.
The destination host address.

10. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
2046
A physical topology.
Originate data flow.

11. 3 facts about the network portion of an IPv4 address
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
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. flow control b. session establishment c. numbering and sequencing
Network Media Control

12. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A random delay helps prevent the stations from experiencing another collision during transmission.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

13. At which layer of the TCP/IP model does ethernet operate?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Access
Is used by the server to resolve names.

14. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. DB 60 b. Winchester 15-pin c. smart serial
Identify the device that allows local network computers to communicate w/ devices in other networks.
To prevent the receiver from being overwhelmed by incoming data.

15. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
Hub
255.255.255.224
Console interface

16. What method of signal transmission uses radio waves to carry signals?
255.255.255.0
It provides for the exchange of data over a common local media.
Wireless
Console interface

17. Which characteristics describe fiber optic cable?
Host mobility
Identify processes or services that are communicating with end devices.
A. it has centralized administration b. security is easier to enforce
A. not affected by EMI of RFI b. most expensive type of LAN cabling

18. An admin needs to keep contents private - which access method should he use?
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
SSH
It has expanded adressing capabilities.
RJ-45

19. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Originate data flow.
255.255.255.224
Router
Host mobility

20. What is the purpose of the TCP/IP Network Application Layer?
Originate data flow.
Static
A. perform degradation b. security issues c. host identification
Network Media Control

21. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Window Size
A. flow control b. session establishment c. numbering and sequencing
A random delay helps prevent the stations from experiencing another collision during transmission.

22. What are 2 forms of application layer software?
2046
A. replace a switch w/ a router b. subnet the new networks
A. application b. services
A. performance degradation b. security issues c. host identification

23. When is a straight-through cable used in a network?
OTDR
When connecting a host to a switch.
Host mobility
Network portion

24. Important characteristic of UDP
Router
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
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Minimal delays in data delivery.

25. What is the primary reason for developing IPv6?
Rollover cable
Collisions can decrease network performance.
Fiber
It has expanded adressing capabilities.

26. What is the primary function of encapsulating packets into frames?
A. goodput b. throughput c. bandwidth
To facilitate the entry and exit of data on media.
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. copper UTP b. optical fiber

27. 3 terms that define the forms of help available within the Cisco IOS
The physical address is added.
A. replace a switch w/ a router b. subnet the new networks
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. hot keys b. context-sensitive c. command syntax check

28. 3 primary functions of the data link layer encapsulation
Fiber
It uses support from the lower layers to distinguish between connections to the service.
A. addressing b. error detection c. frame delimiting
A. identifies the communicating applications b. identifies multiple conversations between the hosts

29. What is a component of a routing table entry?
8
Next-Hop Address
A. hot keys b. context-sensitive c. command syntax check
A. netstat -r b. route PRINT

30. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Hub
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
255.255.255.224

31. Which IP packet field will prevent endless loops?
A. hot keys b. context-sensitive c. command syntax check
RJ-45
Time-to-live (TTL)
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

32. 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?
Hosts return to listen-before-transmit mode.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
2046
A random delay helps prevent the stations from experiencing another collision during transmission.

33. What is a characteristic of a logical point-to-point topology?
255.255.255.0
The MAC protocol can be very simple.
UTP
0 to 1023

34. What do the intermediary devices in the network do?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
It provides interface between applications on either end of the network.
Destination is not contacted before a packet is sent.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

35. In a connectionless system - What is correct?
UDP
Switch
A. physical layer b. DLL layer
Destination is not contacted before a packet is sent.

36. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Supports error detection.
The address of the router that the host will use to 'get to the other side'.
255.255.255.0

37. 3 common problems w/ a large network
It reduces unnecessary broadcasts.
A. performance degradation b. security issues c. host identification
Create signals that represent the bits in each frame for the 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

38. What statements describe the logical token-passing topology?
255.255.255.224
A random delay helps prevent the stations from experiencing another collision during transmission.
A. DNS b. SMTP c. POP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

39. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
To facilitate the entry and exit of data on media.
Rollover cable
The MAC protocol can be very simple.

40. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
A random delay helps prevent the stations from experiencing another collision during transmission.
To prevent the receiver from being overwhelmed by incoming data.
Window Size

41. What is a drawback of the CSMA/CD access method?
Window Size
Collisions can decrease network performance.
Physical
The physical address is added.

42. 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?
Network Layer Packet
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
8
Time-to-live (TTL)

43. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Hub
80 (HTTP)
A. show startup-config b. show running-config
Destination Network Address

44. Which layer supplies services and allows user interface?
DNS
Host mobility
Source and Destination Ports
Application Layer

45. What can be a problem that is reduced by adding end-to-end addressing?
Host A
It reduces unnecessary broadcasts.
A. decentralized resources b. resource sharing w/o a dedicated server
A. Cat5 UTP b. Cat6 UTP

46. Why are port numbers included in the TCP header of a segment?
Transport
Identify the device that allows local network computers to communicate w/ devices in other networks.
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

47. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Fiber
It provides interface between applications on either end of the network.
Hosts return to listen-before-transmit mode.
Network address

48. What is a characteristic of a single-mode fiber-optic cable?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It uses lasers as the light source.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
The address of the router that the host will use to 'get to the other side'.

49. What is dinamically selected by the source host when forwarding data?
It does not support encryption.
Source Port
A. netstat -r b. route PRINT
Network Layer

50. What is the proper order of the OSI Layers?
Flash
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Supports error detection.
Create signals that represent the bits in each frame for the media.