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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 a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
A. enable mode b. priviledge executive mode
Twisting of the cables
Ctrl + Shift + 6

2. What correctly describes a MAC address?
A backbone cable.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. physical layer b. DLL layer

3. At which layer of the TCP/IP model does ethernet operate?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Access
A physical topology.
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

4. 3 measures of data transfer
255.255.255.224
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. performance degradation b. security issues c. host identification
A. goodput b. throughput c. bandwidth

5. Which IP packet field will prevent endless loops?
Source and Destination Ports
SMB
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Time-to-live (TTL)

6. Which 2 options represent Layer 4 addressing?
80 (HTTP)
8
A. identifies the communicating applications b. identifies multiple conversations between the hosts
The destination host address.

7. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
Next-Hop Address
A. goodput b. throughput c. bandwidth
A. it has centralized administration b. security is easier to enforce

8. What characteristic of an UTP helps reduce interference?
Twisting of the cables
A. hot keys b. context-sensitive c. command syntax check
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Router(config)# hostname Costas

9. statements of IP adressing
FTP
A random delay helps prevent the stations from experiencing another collision during transmission.
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
Show Interfaces

10. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
A. perform degradation b. security issues c. host identification
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 random delay helps prevent the stations from experiencing another collision during transmission.

11. If you have a full-duplex operational network - what can happen?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
No collisions will occur on this link.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Router

12. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
When connecting a host to a switch.
A. goodput b. throughput c. bandwidth
A backbone cable.

13. 3 properties of peer-2-peer applications
Physical
Network Layer Packet
A. flow control b. session establishment c. numbering and sequencing
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

14. What are 3 pieces of info about a route contained in a routing table?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Wireless
Originate data flow.
A. next-hop b. metric/interface c. destination network address

15. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
As the commands are entered.
A. goodput b. throughput c. bandwidth
Flash

16. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
Fiber
To facilitate the entry and exit of data on media.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

17. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The address of the router that the host will use to 'get to the other side'.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
0 to 1023

18. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
OTDR

19. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
It provides for the exchange of data over a common local media.
Destination is not contacted before a packet is sent.
Destination Network Address

20. 2 characteristics of clients in data networks
OTDR
A. they initiate data exchanges b. they may upload data to servers
SSH
Network Media Control

21. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. purpose b. geographic location c. ownership
Transport
It uses support from the lower layers to distinguish between connections to the service.
2046

22. 3 characteristics of valid Ethernet Layer 2 addresses
They must wait until the first hosts finish transfering the media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It uses lasers as the light source.
Supports error detection.

23. What is PDU?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Is a layer of specific encapsulation.
0 to 1023
UTP

24. Which type of cable is most often associated w/ fiber-optic cable?
Console interface
A backbone cable.
A. copper UTP b. optical fiber
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

25. 3 statements about the role of routers in the network
UDP
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
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

26. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
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
Originate data flow.

27. 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. next-hop b. metric/interface c. destination network address
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. flow control b. session establishment c. numbering and sequencing
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

28. Important characteristic of UDP
Minimal delays in data delivery.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. minimizing of collisions b. division into broadcast domains
Identify processes or services that are communicating with end devices.

29. 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. not affected by EMI of RFI b. most expensive type of LAN cabling
They must wait until the first hosts finish transfering the media.
Resolve IPv4 addresses to MAC addresses.
Any device whose backoff timer expires first.

30. What application layer protocol is used to support file transfers between client and server?
A. servers b. routers c. network printers
No collisions will occur on this link.
SMB
FTP

31. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
No collisions will occur on this link.
UTP
Host A
A. purpose b. geographic location c. ownership

32. 3 statements of media acess control
A. DB 60 b. Winchester 15-pin c. smart serial
Ctrl + Shift + 6
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

33. What are 2 commands used to view a host routing table?
Network address
Create signals that represent the bits in each frame for the media.
A. netstat -r b. route PRINT
Logical Link Control sublayer

34. In a connectionless system - What is correct?
Network Layer Packet
Collisions can decrease network performance.
It provides for the exchange of data over a common local media.
Destination is not contacted before a packet is sent.

35. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
The magnetic field around the adjacent pairs of wire.
No collisions will occur on this link.
Router(config)# interface FastEthernet 0/1

36. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Destination Network Address
Router(config)# interface FastEthernet 0/1
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Hub

37. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
DNS
Is a layer of specific encapsulation.
FTP

38. What is a characteristic of a single-mode fiber-optic cable?
FTP
Flash
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It uses lasers as the light source.

39. 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
The address of the router that the host will use to 'get to the other side'.
172.16.192.160
A. goodput b. throughput c. bandwidth

40. When a device is moved from one network to the other...?
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
It provides for the exchange of data over a common local media.
A. HTTP b. HTTPS
A. non-deterministic b. less overhead c. collisions exist

41. When a network service fails - which port is most often used to access a router for management purposes?
Next-Hop Address
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
It does not support encryption.
Console

42. If you have a small network w/ 3 computers...
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
Network Layer
Create signals that represent the bits in each frame for the media.
A. media sharing b. logical topology

43. An admin needs to keep contents private - which access method should he use?
SSH
The address of the router that the host will use to 'get to the other side'.
Signal loss can be experienced.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

44. 3 functions of the upper data link sublayer in the OSI model
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It provides interface between applications on either end of the network.
A. replace a switch w/ a router b. subnet the new networks

45. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Network portion
8
Collisions can decrease network performance.
255.255.255.224

46. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. perform degradation b. security issues c. host identification
The magnetic field around the adjacent pairs of wire.
Source and Destination IP address

47. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Host A
A. Cat5 UTP b. Cat6 UTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

48. 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.
Ctrl + Shift + 6
Console
A physical topology.

49. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Source and Destination IP address
They must wait until the first hosts finish transfering the media.
Hosts return to listen-before-transmit mode.
A. HTTP b. HTTPS

50. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. router b. firewall
A. it has centralized administration b. security is easier to enforce
Binary ANDing
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