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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. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. physical layer b. DLL layer
A. decentralized resources b. resource sharing w/o a dedicated server
Network

2. What networking devices are recommended to be assigned static IP addresses?
Console
A. servers b. routers c. network printers
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

3. What causes crosstalk within cable pairs when using UTP?
Twisting of the cables
Network
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
The magnetic field around the adjacent pairs of wire.

4. What information is added during encapsulation at OSI Layer 3?
RJ-45
Source and Destination IP address
To prevent the receiver from being overwhelmed by incoming data.
Identify the device that allows local network computers to communicate w/ devices in other networks.

5. What is a protocol that provides connectionless network layer services?
FTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Router(config)# hostname Costas
IP Protocol

6. What are 3 properties of contention-based media access for a shared media?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. non-deterministic b. less overhead c. collisions exist
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

7. What is the function of the DLL?
Network portion
It provides for the exchange of data over a common local media.
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
IP is not properly installed

8. What is a benefit of a WAN?
2046
Host mobility
A. next-hop b. metric/interface c. destination network address
Is a layer of specific encapsulation.

9. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
It uses lasers as the light source.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. enable mode b. priviledge executive mode

10. Why are port numbers included in the TCP header of a segment?
IP Protocol
The magnetic field around the adjacent pairs of wire.
Network
To enable a receiving host to forward the data to the appropriate application.

11. Which characteristics describe fiber optic cable?
TCP initializes the sequence numbers for the sessions.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Physical
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

12. During a TCP session - if packets arrive out of order - what will happen?
A. servers b. routers c. network printers
The packets will be delivered and reassembled at destination.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. minimizing of collisions b. division into broadcast domains

13. Which portion of the network layer address does a router use to forward packets?
A. Cat5 UTP b. Cat6 UTP
Twisting of the cables
A. application b. services
Network portion

14. What is dinamically selected by the source host when forwarding data?
Hub
A physical topology.
Source Port
A. next-hop b. metric/interface c. destination network address

15. What info is found in the TCP and UDP header info?
Hub
Source and Destination Ports
A. netstat -r b. route PRINT
32 bits

16. Why is flow control used for TCP data transfer?
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
Network Layer
To prevent the receiver from being overwhelmed by incoming data.
A. goodput b. throughput c. bandwidth

17. What is the primary function of encapsulating packets into frames?
A random delay helps prevent the stations from experiencing another collision during transmission.
Console
To facilitate the entry and exit of data on media.
Resolve IPv4 addresses to MAC addresses.

18. 3 primary functions of the data link layer encapsulation
A. HTTP b. HTTPS
Flash
A. addressing b. error detection c. frame delimiting
255.255.255.224

19. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
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
A. show startup-config b. show running-config
Source Port

20. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A backbone cable.
Destination Network Address
A. show startup-config b. show running-config

21. What is the primary purpose of ARP?
A. low overhead b. connectionless
Resolve IPv4 addresses to MAC addresses.
Logical Link Control sublayer
Supports error detection.

22. What do you need to use for an initial configuration on a Cisco router?
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. router b. firewall
Console interface
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

23. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A random delay helps prevent the stations from experiencing another collision during transmission.
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
0 to 1023
The destination host address.

24. What application layer protocol is used to support file transfers between client and server?
Host mobility
FTP
Twisting of the cables
Create signals that represent the bits in each frame for the media.

25. What method of signal transmission uses radio waves to carry signals?
80 (HTTP)
Wireless
A. media sharing b. logical topology
To prevent the receiver from being overwhelmed by incoming data.

26. What determines the method of media access control?
The physical address is added.
The packets will be delivered and reassembled at destination.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. media sharing b. logical topology

27. 3 statements about the role of routers in the network
Hub
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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

28. What can be a problem that is reduced by adding end-to-end addressing?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Host A
It reduces unnecessary broadcasts.

29. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Network portion
A default gateway (router).
2046

30. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Collisions can decrease network performance.
Supports error detection.
Network address
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

31. 3 statements of media acess control
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
Hub
A. decentralized resources b. resource sharing w/o a dedicated server
Rollover cable

32. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
The address of the router that the host will use to 'get to the other side'.
A. enable mode b. priviledge executive mode
Flash

33. statements of IP adressing
A. it has centralized administration b. security is easier to enforce
Time-to-live (TTL)
A default gateway (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

34. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
SMB
Network Layer Packet
A. addressing b. error detection c. frame delimiting
UDP

35. 3 functions of the upper data link sublayer in the OSI model
A default gateway (router).
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. physical layer b. DLL layer

36. What 2 type of cables would most commonly be used for new runs?
8
Window Size
A. Cat5 UTP b. Cat6 UTP
A. perform degradation b. security issues c. host identification

37. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
80 (HTTP)
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 is the purpose of a default gateway?
IP is not properly installed
Identify the device that allows local network computers to communicate w/ devices in other networks.
Signal loss can be experienced.
Fiber

39. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It uses lasers as the light source.
A. it has centralized administration b. security is easier to enforce
Hosts return to listen-before-transmit mode.
Next-Hop Address

40. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. Physical b. Data Link
Router(config)# interface FastEthernet 0/1
A. servers b. routers c. network printers
A. non-deterministic b. less overhead c. collisions exist

41. What are 3 pieces of info about a route contained in a routing table?
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. next-hop b. metric/interface c. destination network address
UTP
Ctrl + Shift + 6

42. 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.
Host mobility
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.

43. What is the proper order of the OSI Layers?
A. router b. firewall
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. application b. presentation c. session d. transmision e. network f. data link g. physical
It has expanded adressing capabilities.

44. 3 features of IPv6
A. DNS b. SMTP c. POP
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The MAC protocol can be very simple.
A. larger address space b. data types and classes of service c. authentication and encryption

45. How many bits make up an IPv4 address?
Logical Link Control sublayer
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. next-hop b. metric/interface c. destination network address
32 bits

46. 3 properties of peer-2-peer applications
It does not support encryption.
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. identifies the communicating applications b. identifies multiple conversations between the hosts
Logical Link Control sublayer

47. Important characteristic of UDP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Minimal delays in data delivery.
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
Host A

48. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
It provides interface between applications on either end of the network.
Time-to-live (TTL)
Network address

49. What are the advantages of using a client-server model?
They must wait until the first hosts finish transfering the media.
A. it has centralized administration b. security is easier to enforce
Hub
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

50. 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?
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. application b. presentation c. session d. transmision e. network f. data link g. physical
They must wait until the first hosts finish transfering the media.
A. minimizing of collisions b. division into broadcast domains