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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 disadvantage of Telnet?
It uses support from the lower layers to distinguish between connections to the service.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Identify the device that allows local network computers to communicate w/ devices in other networks.
It does not support encryption.

2. What can you identify when you examine the Network Layer header?
A backbone cable.
IP Protocol
The destination host address.
A. perform degradation b. security issues c. host identification

3. What is an automated service that matches resource names w/ required IP addresses?
A. it has centralized administration b. security is easier to enforce
DNS
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
It provides interface between applications on either end of the network.

4. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. Cat5 UTP b. Cat6 UTP
Is used by the server to resolve names.
To prevent the receiver from being overwhelmed by incoming data.

5. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
TCP initializes the sequence numbers for the sessions.
Router(config)# interface FastEthernet 0/1
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

6. 2 functions of encapsulation
UTP
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
Console interface
A. servers b. routers c. network printers

7. 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?
Physical
IP Protocol
A. show startup-config b. show running-config
They must wait until the first hosts finish transfering the media.

8. 2 characteristics of clients in data networks
172.16.192.160
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Source and Destination IP address
A. they initiate data exchanges b. they may upload data to servers

9. What is a default gateway address?

10. What is the purpose of the TCP/IP Network Application Layer?
A physical topology.
IP is not properly installed
FTP
Network Media Control

11. What info is found in the TCP and UDP header info?
A. perform degradation b. security issues c. host identification
UTP
Source and Destination Ports
A. router b. firewall

12. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
MAC
To facilitate the entry and exit of data on media.

13. When is a straight-through cable used in a network?
Show Interfaces
Console interface
When connecting a host to a switch.
A. Physical b. Data Link

14. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. HTTP b. HTTPS
Create signals that represent the bits in each frame for the media.
Switch
IP Protocol

15. What is the proper order of the OSI Layers?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
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. application b. presentation c. session d. transmision e. network f. data link g. physical

16. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
To facilitate the entry and exit of data on media.
Create signals that represent the bits in each frame for the media.
255.255.255.0
A. physical layer b. DLL layer

17. 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.
Resolve IPv4 addresses to MAC addresses.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. goodput b. throughput c. bandwidth

18. statements of IP adressing
A. show startup-config b. show running-config
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 default gateway (router).
A. MTA b. SMTP

19. How does the application layer on a server process multiple client requests for services?
Binary ANDing
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# interface FastEthernet 0/1
RJ-45

20. 3 characteristics of valid Ethernet Layer 2 addresses
Application Layer
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
0 to 1023
A. application b. services

21. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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
Next-Hop Address
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

22. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. Cat5 UTP b. Cat6 UTP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Hosts return to listen-before-transmit mode.
It uses lasers as the light source.

23. What is an effect of improperly applying a network cable connector?
2046
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Signal loss can be experienced.
A. it has centralized administration b. security is easier to enforce

24. What information is added during encapsulation at OSI Layer 3?
Create signals that represent the bits in each frame for the media.
Source and Destination IP address
Static
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

25. What is a benefit of a WAN?
Flash
A. router b. firewall
To facilitate the entry and exit of data on media.
Host mobility

26. If there is a graphic representation of a company network wiring and equipment - What is this called?
Host mobility
A. next-hop b. metric/interface c. destination network address
A. minimizing of collisions b. division into broadcast domains
A physical topology.

27. What are 3 common problems w/ large networks?
Network Layer Packet
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. enable mode b. priviledge executive mode
A. perform degradation b. security issues c. host identification

28. 3 factors that should be considered when implementing Layer 2 protocols
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
Host mobility
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Create signals that represent the bits in each frame for the media.

29. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. decentralized resources b. resource sharing w/o a dedicated server
Is used by the server to resolve names.
Router(config)# hostname Costas
IP is not properly installed

30. 3 statements of media acess control
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. non-deterministic b. less overhead c. collisions exist
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
FTP

31. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
Physical
SMB
Console

32. In business LANs - which connector is used w/ twisted-pair networking cable?
Router(config)# interface FastEthernet 0/1
32 bits
Hub
RJ-45

33. An admin needs to keep contents private - which access method should he use?
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
Is used by the server to resolve names.
A backbone cable.
SSH

34. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Ctrl + Shift + 6
A. next-hop b. metric/interface c. destination network address
The destination host address.

35. 2 characteristics of peer-2-peer
A. flow control b. session establishment c. numbering and sequencing
The address of the router that the host will use to 'get to the other side'.
IP is not properly installed
A. decentralized resources b. resource sharing w/o a dedicated server

36. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
255.255.255.0
A. goodput b. throughput c. bandwidth
FTP

37. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Console interface
UDP
A physical topology.
Network portion

38. 3 measures of data transfer
Physical
A. DNS b. SMTP c. POP
A. non-deterministic b. less overhead c. collisions exist
A. goodput b. throughput c. bandwidth

39. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
UDP
2046
To enable a receiving host to forward the data to the appropriate application.

40. What is the function of the DLL?
Static
It provides for the exchange of data over a common local media.
The destination host address.
Router(config)# hostname Costas

41. Which IP packet field will prevent endless loops?
Router
Time-to-live (TTL)
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. application b. services

42. What type of network cable is used between a terminal and a console port?
Rollover cable
Is used by the server to resolve names.
A. DNS b. SMTP c. POP
It uses lasers as the light source.

43. 3 terms that define the forms of help available within the Cisco IOS
Router(config)# hostname Costas
80 (HTTP)
A. hot keys b. context-sensitive c. command syntax check
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

44. What kind of problems are caused by excessive broadcast traffic on network segments?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
80 (HTTP)
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

45. What are 2 features of User Diagram Protocol (UDP)?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. low overhead b. connectionless
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. it has centralized administration b. security is easier to enforce

46. What is the primary reason for developing IPv6?
IP Protocol
The MAC protocol can be very simple.
It has expanded adressing capabilities.
Any device whose backoff timer expires first.

47. 3 statements about routes and their use
Network Media Control
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
TCP initializes the sequence numbers for the sessions.
2046

48. What is a component of a routing table entry?
MAC
Console
Next-Hop Address
It does not support encryption.

49. When do changes take effect in a Cisco router?
Wireless
SMB
Binary ANDing
As the commands are entered.

50. What application layer protocol is used to support file transfers between client and server?
A default gateway (router).
FTP
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
Fiber