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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. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
32 bits
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
When connecting a host to a switch.

2. 2 characteristics of peer-2-peer
Source and Destination IP address
Supports error detection.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. decentralized resources b. resource sharing w/o a dedicated server

3. Which characteristics describe fiber optic cable?
A. purpose b. geographic location c. ownership
A. perform degradation b. security issues c. host identification
A. netstat -r b. route PRINT
A. not affected by EMI of RFI b. most expensive type of LAN cabling

4. There are too many broadcasts on switches - what can be done?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
It uses support from the lower layers to distinguish between connections to the service.
A. replace a switch w/ a router b. subnet the new networks

5. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. media sharing b. logical topology
Rollover cable
Identify the device that allows local network computers to communicate w/ devices in other networks.
Supports error detection.

6. 3 features that allow TCP to realibly and accurately track the transmission of data
255.255.255.0
They must wait until the first hosts finish transfering the media.
Host A
A. flow control b. session establishment c. numbering and sequencing

7. What determines the method of media access control?
A. media sharing b. logical topology
It uses support from the lower layers to distinguish between connections to the service.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Create signals that represent the bits in each frame for the media.

8. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Network
The physical address is added.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

9. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
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
Show Interfaces

10. What type of routing uses information that is manually entered into the routing table?
A. hot keys b. context-sensitive c. command syntax check
Static
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. copper UTP b. optical fiber

11. What is an automated service that matches resource names w/ required IP addresses?
Application Layer
DNS
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Identify processes or services that are communicating with end devices.

12. What is the purpose of a default gateway?
A. flow control b. session establishment c. numbering and sequencing
Source and Destination IP address
Identify the device that allows local network computers to communicate w/ devices in other networks.
172.16.192.160

13. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Hosts return to listen-before-transmit mode.
A. physical layer b. DLL layer
80 (HTTP)
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

14. When destination network is not in the routing table - What are 2 actions the router might take?
Router(config)# hostname Costas
A. goodput b. throughput c. bandwidth
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

15. In a connectionless system - What is correct?
Application Layer
Network
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Destination is not contacted before a packet is sent.

16. What is a drawback of the CSMA/CD access method?
A. media sharing b. logical topology
Collisions can decrease network performance.
Resolve IPv4 addresses to MAC addresses.
Show Interfaces

17. Default Gateway is incorrect on the host - What is the impact on the communications?
80 (HTTP)
When connecting a host to a switch.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Destination is not contacted before a packet is sent.

18. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Switch
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

19. What is dinamically selected by the source host when forwarding data?
It provides for the exchange of data over a common local media.
IP is not properly installed
Source Port
A default gateway (router).

20. What is a characteristic of a single-mode fiber-optic cable?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Source and Destination Ports
It uses lasers as the light source.
Network Layer Packet

21. 2 characteristics of clients in data networks
To facilitate the entry and exit of data on media.
Flash
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. they initiate data exchanges b. they may upload data to servers

22. What is a component of a routing table entry?
They must wait until the first hosts finish transfering the media.
Next-Hop Address
Transport
Network Layer Packet

23. An admin needs to keep contents private - which access method should he use?
Minimal delays in data delivery.
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
SSH
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

24. When do changes take effect in a Cisco router?
Rollover cable
Time-to-live (TTL)
As the commands are entered.
A. router b. firewall

25. 3 statements about the role of routers in the network
Router
To facilitate the entry and exit of data on media.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

26. 3 protocols that operate in the application layer
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
80 (HTTP)
To facilitate the entry and exit of data on media.
A. DNS b. SMTP c. POP

27. What device can check for faults - integrity and performance of media?
Router(config)# hostname Costas
UDP
OTDR
Host A

28. In business LANs - which connector is used w/ twisted-pair networking cable?
MAC
Network portion
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
RJ-45

29. 2 most commonly used media types in ethernet networks
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Source and Destination IP address
A. copper UTP b. optical fiber
A. addressing b. error detection c. frame delimiting

30. How does the application layer on a server process multiple client requests for services?
80 (HTTP)
A. the router will discard the packet b. the router will send a time exceeded message to the source host
It uses support from the lower layers to distinguish between connections to the service.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

31. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. performance degradation b. security issues c. host identification
Signal loss can be experienced.
A. Physical b. Data Link
A. purpose b. geographic location c. ownership

32. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. Physical b. Data Link
Source and Destination IP address
The magnetic field around the adjacent pairs of wire.

33. Which 2 options represent Layer 4 addressing?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
SMB
Show Interfaces
A. identifies the communicating applications b. identifies multiple conversations between the hosts

34. What event occurs during the 3-way handshake?
Network portion
Destination is not contacted before a packet is sent.
TCP initializes the sequence numbers for the sessions.
It uses support from the lower layers to distinguish between connections to the service.

35. What is the function of the DLL?
Hosts return to listen-before-transmit mode.
To enable a receiving host to forward the data to the appropriate application.
It provides for the exchange of data over a common local media.
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. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
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. goodput b. throughput c. bandwidth
A random delay helps prevent the stations from experiencing another collision during transmission.
Hosts return to listen-before-transmit mode.

37. What are 3 properties of contention-based media access for a shared media?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Network portion
It provides interface between applications on either end of the network.
A. non-deterministic b. less overhead c. collisions exist

38. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
255.255.255.0
It uses support from the lower layers to distinguish between connections to the service.
Is a layer of specific encapsulation.

39. 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?
Ctrl + Shift + 6
A. flow control b. session establishment c. numbering and sequencing
8
A. physical layer b. DLL layer

40. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. router b. firewall
Router(config)# hostname Costas
Transport

41. What characteristic of an UTP helps reduce interference?
Twisting of the cables
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Show Interfaces
255.255.255.224

42. During a TCP session - if packets arrive out of order - what will happen?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
The packets will be delivered and reassembled at destination.
It does not support encryption.
Network

43. What layer encapsulates segments into packets?
A. they initiate data exchanges b. they may upload data to servers
Destination Network Address
Network Layer
Is used by the server to resolve names.

44. Which device is used to create or divide broadcast domains?
A. decentralized resources b. resource sharing w/o a dedicated server
A. copper UTP b. optical fiber
A. minimizing of collisions b. division into broadcast domains
Router

45. 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
0 to 1023
A. copper UTP b. optical fiber
A. enable mode b. priviledge executive mode

46. What command is used to change the default name to 'Costas'?
A. decentralized resources b. resource sharing w/o a dedicated server
Router(config)# hostname Costas
No collisions will occur on this link.
Hosts return to listen-before-transmit mode.

47. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
To enable a receiving host to forward the data to the appropriate application.
Router(config)# interface FastEthernet 0/1
A. flow control b. session establishment c. numbering and sequencing
255.255.255.224

48. 3 facts about the network portion of an IPv4 address
A. MTA b. SMTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. purpose b. geographic location c. ownership
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

49. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. non-deterministic b. less overhead c. collisions exist
The MAC protocol can be very simple.

50. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Hosts return to listen-before-transmit mode.
A. enable mode b. priviledge executive mode
Physical