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. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Show Interfaces
Console
8
Hosts return to listen-before-transmit mode.

2. What do you need to use for an initial configuration on a Cisco router?
It uses support from the lower layers to distinguish between connections to the service.
Console interface
A. flow control b. session establishment c. numbering and sequencing
Network Access

3. 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.
The magnetic field around the adjacent pairs of wire.
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
Time-to-live (TTL)

4. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. flow control b. session establishment c. numbering and sequencing
Source and Destination Ports
A. MTA b. SMTP
UDP

5. 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?
It provides interface between applications on either end of the network.
Host A
8
Network portion

6. 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?
Application Layer
2046
Fiber
Any device whose backoff timer expires first.

7. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
A. physical layer b. DLL layer
Twisting of the cables
A. show startup-config b. show running-config

8. What is dinamically selected by the source host when forwarding data?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
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
Source Port
Create signals that represent the bits in each frame for the media.

9. 3 statements about routes and their use
Window Size
Network Layer Packet
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

10. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. perform degradation b. security issues c. host identification
A backbone cable.
255.255.255.224
Logical Link Control sublayer

11. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Rollover cable
Ctrl + Shift + 6
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

12. When destination network is not in the routing table - What are 2 actions the router might take?
Physical
Network Layer
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

13. What are 2 commands used to view a host routing table?
It uses support from the lower layers to distinguish between connections to the service.
A. decentralized resources b. resource sharing w/o a dedicated server
A. netstat -r b. route PRINT
Router(config)# interface FastEthernet 0/1

14. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
Identify processes or services that are communicating with end devices.
To enable a receiving host to forward the data to the appropriate application.
The physical address is added.

15. 3 protocols that operate in the application layer
To prevent the receiver from being overwhelmed by incoming data.
UDP
Hub
A. DNS b. SMTP c. POP

16. 3 properties of peer-2-peer applications
Router
172.16.192.160
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
Any device whose backoff timer expires first.

17. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The magnetic field around the adjacent pairs of wire.
0 to 1023
A default gateway (router).

18. What is an automated service that matches resource names w/ required IP addresses?
DNS
To facilitate the entry and exit of data on 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
A. low overhead b. connectionless

19. What is the primary purpose of Layer 4?
To facilitate the entry and exit of data on media.
Network portion
Identify processes or services that are communicating with end devices.
It has expanded adressing capabilities.

20. Network Protocols
A. decentralized resources b. resource sharing w/o a dedicated server
A. larger address space b. data types and classes of service c. authentication and encryption
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

21. 2 features that make switches preferable to hubs
Host A
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. minimizing of collisions b. division into broadcast domains

22. Which layer supplies services and allows user interface?
Application Layer
When connecting a host to a switch.
Network
2046

23. What is an effect of improperly applying a network cable connector?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. perform degradation b. security issues c. host identification
Signal loss can be experienced.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

24. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Source and Destination IP address
A. decentralized resources b. resource sharing w/o a dedicated server
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

25. 3 features that allow TCP to realibly and accurately track the transmission of data
A. hot keys b. context-sensitive c. command syntax check
It reduces unnecessary broadcasts.
A. flow control b. session establishment c. numbering and sequencing
The magnetic field around the adjacent pairs of wire.

26. statements of IP adressing
Network Access
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
UDP

27. What is the purpose of resource records in DNS?
Static
Source and Destination Ports
Is used by the server to resolve names.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

28. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
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
Show Interfaces
Destination Network Address
IP is not properly installed

29. What type of network cable is used between a terminal and a console port?
IP Protocol
When connecting a host to a switch.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Rollover cable

30. 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
0 to 1023
32 bits
The magnetic field around the adjacent pairs of wire.

31. What are the advantages of using a client-server model?
Logical Link Control sublayer
255.255.255.224
A. it has centralized administration b. security is easier to enforce
Network portion

32. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
It uses support from the lower layers to distinguish between connections to the service.
A. HTTP b. HTTPS
It does not support encryption.

33. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Collisions can decrease network performance.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network

34. What is the purpose of a default gateway?
Identify processes or services that are communicating with end devices.
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.
Source and Destination IP address

35. What is a component of a routing table entry?
A. they initiate data exchanges b. they may upload data to servers
A. non-deterministic b. less overhead c. collisions exist
Next-Hop Address
A. low overhead b. connectionless

36. What 2 type of cables would most commonly be used for new runs?
The magnetic field around the adjacent pairs of wire.
It uses support from the lower layers to distinguish between connections to the service.
A. Cat5 UTP b. Cat6 UTP
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

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

38. 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
It does not support encryption.
A. media sharing b. logical topology

39. 2 functions of encapsulation
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
A. copper UTP b. optical fiber
It has expanded adressing capabilities.
Switch

40. What networking devices are recommended to be assigned static IP addresses?
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
Network portion
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. servers b. routers c. network printers

41. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Host A
The MAC protocol can be very simple.
Source and Destination Ports
Source and Destination IP address

42. 3 primary functions of the data link layer encapsulation
Resolve IPv4 addresses to MAC addresses.
Source and Destination IP address
Network
A. addressing b. error detection c. frame delimiting

43. 3 functions of the upper data link sublayer in the OSI model
A default gateway (router).
Identify the device that allows local network computers to communicate w/ devices in other networks.
DNS
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

44. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
A. DB 60 b. Winchester 15-pin c. smart serial
A physical topology.
Identify the device that allows local network computers to communicate w/ devices in other networks.

45. When a device is moved from one network to the other...?
Any device whose backoff timer expires first.
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
255.255.255.224
Collisions can decrease network performance.

46. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. low overhead b. connectionless
The destination host address.
A. hot keys b. context-sensitive c. command syntax check
Fiber

47. What is the primary reason for developing IPv6?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
It has expanded adressing capabilities.
UDP
A. replace a switch w/ a router b. subnet the new networks

48. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. addressing b. error detection c. frame delimiting
80 (HTTP)
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
IP Protocol

49. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
Hosts return to listen-before-transmit mode.
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. application b. services

50. 3 statements of media acess control
Logical Link Control sublayer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Twisting of the cables
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