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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 is the primary function of encapsulating packets into frames?
A. DNS b. SMTP c. POP
To facilitate the entry and exit of data on media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

2. What event occurs during the 3-way handshake?
A. DNS b. SMTP c. POP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
TCP initializes the sequence numbers for the sessions.

3. 3 functions of the upper data link sublayer in the OSI model
A. low overhead b. connectionless
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
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
Rollover cable

4. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Logical Link Control sublayer
A. perform degradation b. security issues c. host identification

5. In a connectionless system - What is correct?
Time-to-live (TTL)
Router(config)# hostname Costas
Destination is not contacted before a packet is sent.
A. copper UTP b. optical fiber

6. At which layer of the TCP/IP model does ethernet operate?
As the commands are entered.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Identify processes or services that are communicating with end devices.
Network Access

7. What device can check for faults - integrity and performance of media?
Rollover cable
OTDR
The magnetic field around the adjacent pairs of wire.
Router

8. What is the primary purpose of ARP?
0 to 1023
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
Resolve IPv4 addresses to MAC addresses.
32 bits

9. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network address
It uses support from the lower layers to distinguish between connections to the service.

10. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
Wireless
Router(config)# interface FastEthernet 0/1
A physical topology.

11. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
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
Network address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

12. 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
Network Access
A. decentralized resources b. resource sharing w/o a dedicated server
OTDR

13. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
8
Rollover cable
172.16.192.160
Network

14. 3 features that allow TCP to realibly and accurately track the transmission of data
A default gateway (router).
A. flow control b. session establishment c. numbering and sequencing
Network
Network Access

15. What are key considering factors when grouping hosts into common networks?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. purpose b. geographic location c. ownership
Fiber
Console interface

16. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To enable a receiving host to forward the data to the appropriate application.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

17. An admin needs to keep contents private - which access method should he use?
Network address
A. larger address space b. data types and classes of service c. authentication and encryption
FTP
SSH

18. What are 3 properties of contention-based media access for a shared media?
A. they initiate data exchanges b. they may upload data to servers
A. addressing b. error detection c. frame delimiting
Is used by the server to resolve names.
A. non-deterministic b. less overhead c. collisions exist

19. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Transport
A physical topology.
A. flow control b. session establishment c. numbering and sequencing

20. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Minimal delays in data delivery.

21. What connectors are commonly associated w/ Cisco's V.35 serial cables?
0 to 1023
A. DB 60 b. Winchester 15-pin c. smart serial
A. Physical b. Data Link
Network address

22. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
SMB
To prevent the receiver from being overwhelmed by incoming data.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

23. What networking devices are recommended to be assigned static IP addresses?
Router
IP is not properly installed
A. servers b. routers c. network printers
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

24. When destination network is not in the routing table - What are 2 actions the router might take?
Hub
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. it has centralized administration b. security is easier to enforce

25. What are 2 protocols for transfering web resources?
Logical Link Control sublayer
Application Layer
A. HTTP b. HTTPS
A. non-deterministic b. less overhead c. collisions exist

26. What can get you to an outside network?
A. flow control b. session establishment c. numbering and sequencing
A default gateway (router).
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
Resolve IPv4 addresses to MAC addresses.

27. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
80 (HTTP)
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A backbone cable.

28. What is the purpose of the preamble in an ethernet frame?
Is used by the server to resolve names.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
UTP
Router(config)# interface FastEthernet 0/1

29. 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. enable mode b. priviledge executive mode
Console
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

30. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
A. addressing b. error detection c. frame delimiting
Fiber
A. HTTP b. HTTPS

31. If you have a small network w/ 3 computers...
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Supports error detection.
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. Cat5 UTP b. Cat6 UTP

32. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
RJ-45
A. HTTP b. HTTPS
A. it has centralized administration b. security is easier to enforce

33. What is the purpose of a default gateway?
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
Wireless

34. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
Minimal delays in data delivery.
Identify processes or services that are communicating with end devices.
0 to 1023

35. statements of IP adressing
Host A
Console
A. HTTP b. HTTPS
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

36. What makes fiber preferable to copper for interconnecting buildings?
A. next-hop b. metric/interface c. destination network address
0 to 1023
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It has expanded adressing capabilities.

37. What describes the purpose of default route?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. router b. firewall
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

38. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Time-to-live (TTL)
Fiber

39. After an ethernet collision - which device has priority to transmit data?
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
A. low overhead b. connectionless
Flash

40. What 2 type of cables would most commonly be used for new runs?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network Layer
A. next-hop b. metric/interface c. destination network address
A. Cat5 UTP b. Cat6 UTP

41. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
RJ-45
To facilitate the entry and exit of data on media.
Is a layer of specific encapsulation.

42. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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
The address of the router that the host will use to 'get to the other side'.
UDP

43. 3 properties of peer-2-peer applications
They must wait until the first hosts finish transfering the media.
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
Hub
A. DB 60 b. Winchester 15-pin c. smart serial

44. What are 2 features of User Diagram Protocol (UDP)?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
MAC
A. perform degradation b. security issues c. host identification
A. low overhead b. connectionless

45. Important characteristic of UDP
Router
A. copper UTP b. optical fiber
FTP
Minimal delays in data delivery.

46. Which type of cable is most often associated w/ fiber-optic cable?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A backbone cable.
To facilitate the entry and exit of data on media.
Source Port

47. 3 measures of data transfer
Network
0 to 1023
A. goodput b. throughput c. bandwidth
Network Access

48. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
Host mobility
When connecting a host to a switch.
Create signals that represent the bits in each frame for the media.

49. 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. show startup-config b. show running-config
A. media sharing b. logical topology
2046
A. hot keys b. context-sensitive c. command syntax check

50. 3 statements about the role of routers in the network
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It does not support encryption.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network portion