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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. statements of IP adressing
Router(config)# hostname Costas
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. Physical b. Data Link
Collisions can decrease network performance.

2. Default Gateway is incorrect on the host - What is the impact on the communications?
Network Access
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. non-deterministic b. less overhead c. collisions exist
A. application b. services

3. 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?
Static
8
When connecting a host to a switch.
A. larger address space b. data types and classes of service c. authentication and encryption

4. What kind of problems are caused by excessive broadcast traffic on network segments?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Console interface
As the commands are entered.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

5. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
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. 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
It uses support from the lower layers to distinguish between connections to the service.

6. What is the purpose of the TCP/IP Network Application Layer?
The packets will be delivered and reassembled at destination.
Network Media Control
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

7. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Network
Identify the device that allows local network computers to communicate w/ devices in other networks.
Router(config)# interface FastEthernet 0/1
Application Layer

8. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
Minimal delays in data delivery.
Network Layer
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

9. Which layer supplies services and allows user interface?
Static
Application Layer
Network Access
A. non-deterministic b. less overhead c. collisions exist

10. What are 2 commands used to view a host routing table?
It does not support encryption.
Router(config)# interface FastEthernet 0/1
A. netstat -r b. route PRINT
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

11. When a network service fails - which port is most often used to access a router for management purposes?
Console
Static
OTDR
A. performance degradation b. security issues c. host identification

12. What are key considering factors when grouping hosts into common networks?
A. router b. firewall
UTP
A. purpose b. geographic location c. ownership
A. show startup-config b. show running-config

13. 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
It uses support from the lower layers to distinguish between connections to the service.
A. application b. services
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

14. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
Network Layer
Host A
Ctrl + Shift + 6

15. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Network Media Control
Source and Destination IP address
The packets will be delivered and reassembled at destination.

16. 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?
172.16.192.160
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Application Layer
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

17. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. show startup-config b. show running-config
The address of the router that the host will use to 'get to the other side'.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

18. What determines the method of media access control?
A. media sharing b. logical topology
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
TCP initializes the sequence numbers for the sessions.
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

19. 3 functions of the upper data link sublayer in the OSI model
Time-to-live (TTL)
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.
0 to 1023

20. If you have a small network w/ 3 computers...
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Network Layer Packet
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
SSH

21. What can you identify when you examine the Network Layer header?
A. application b. services
Network Media Control
The destination host address.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

22. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. replace a switch w/ a router b. subnet the new networks
To facilitate the entry and exit of data on media.
Network

23. 2 functions of encapsulation
UDP
Logical Link Control sublayer
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
Resolve IPv4 addresses to MAC addresses.

24. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
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
It uses support from the lower layers to distinguish between connections to the service.
Physical
A. Cat5 UTP b. Cat6 UTP

25. What is the role of the OSI Application Layer?
A. DB 60 b. Winchester 15-pin c. smart serial
Hub
It provides interface between applications on either end of the network.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

26. If you have a full-duplex operational network - what can happen?
A. goodput b. throughput c. bandwidth
No collisions will occur on this link.
A. minimizing of collisions b. division into broadcast domains
Identify processes or services that are communicating with end devices.

27. What info is found in the TCP and UDP header info?
Wireless
Source and Destination Ports
A. copper UTP b. optical fiber
RJ-45

28. 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
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Network address
Transport

29. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. DB 60 b. Winchester 15-pin c. smart serial
Fiber
Rollover cable
Physical

30. What method of signal transmission uses radio waves to carry signals?
The destination host address.
Any device whose backoff timer expires first.
Physical
Wireless

31. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. enable mode b. priviledge executive mode
A random delay helps prevent the stations from experiencing another collision during transmission.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

32. 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)
Network Layer
As the commands are entered.
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

33. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Show Interfaces
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
IP is not properly installed
A. netstat -r b. route PRINT

34. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
Router(config)# hostname Costas
A. enable mode b. priviledge executive mode
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

35. At which layers of the OSI model does ethernet operate?
Router(config)# interface FastEthernet 0/1
Hosts return to listen-before-transmit mode.
A. physical layer b. DLL layer
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

36. When destination network is not in the routing table - What are 2 actions the router might take?
A. servers b. routers c. network printers
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
They must wait until the first hosts finish transfering the media.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

37. Statements that describe LAN
The physical address is added.
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 MAC protocol can be very simple.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

38. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
RJ-45
A. application b. services
Supports error detection.

39. 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. media sharing b. logical topology
The packets will be delivered and reassembled at destination.
Physical
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

40. What is the primary purpose of Layer 4?
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
The packets will be delivered and reassembled at destination.
Host mobility
Identify processes or services that are communicating with end devices.

41. What is an automated service that matches resource names w/ required IP addresses?
A. next-hop b. metric/interface c. destination network address
Time-to-live (TTL)
DNS
A. router b. firewall

42. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Router(config)# hostname Costas
Source and Destination Ports
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Hosts return to listen-before-transmit mode.

43. What is a default gateway address?

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44. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. physical layer b. DLL layer
80 (HTTP)
SMB
Console interface

45. 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?
8
A. perform degradation b. security issues c. host identification
They must wait until the first hosts finish transfering the media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

46. What can get you to an outside network?
Create signals that represent the bits in each frame for the media.
A default gateway (router).
Minimal delays in data delivery.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

47. If there is a graphic representation of a company network wiring and equipment - What is this called?
OTDR
Console interface
A. flow control b. session establishment c. numbering and sequencing
A physical topology.

48. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
OTDR
Originate data flow.
A. MTA b. SMTP
Transport

49. What do end devices do?
TCP initializes the sequence numbers for the sessions.
Router(config)# interface FastEthernet 0/1
As the commands are entered.
Originate data flow.

50. Network Protocols
IP is not properly installed
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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