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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. Intermediary devices used to implement security between networks
The MAC protocol can be very simple.
A. router b. firewall
A. HTTP b. HTTPS
SSH

2. 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
DNS
UDP
Create signals that represent the bits in each frame for the media.

3. What are 2 common characteristics associated w/ dynamic routing protocols?
Network Access
A. low overhead b. connectionless
To prevent the receiver from being overwhelmed by incoming data.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

4. How many bits make up an IPv4 address?
Collisions can decrease network performance.
A. hot keys b. context-sensitive c. command syntax check
32 bits
A. they initiate data exchanges b. they may upload data to servers

5. 3 statements about routes and their use
Identify the device that allows local network computers to communicate w/ devices in other networks.
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. netstat -r b. route PRINT
A. addressing b. error detection c. frame delimiting

6. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
255.255.255.224
SMB
It uses lasers as the light source.
A. enable mode b. priviledge executive mode

7. What is an automated service that matches resource names w/ required IP addresses?
SSH
The physical address is added.
DNS
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

8. 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
Originate data flow.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Rollover cable

9. During encapsulation - what happens in the Data Link Layer?
Network portion
The physical address is added.
It provides interface between applications on either end of the network.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

10. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. MTA b. SMTP
0 to 1023

11. What device can check for faults - integrity and performance of media?
Network Access
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
OTDR
FTP

12. What are key considering factors when grouping hosts into common networks?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The packets will be delivered and reassembled at destination.
Router
A. purpose b. geographic location c. ownership

13. What do you need to use for an initial configuration on a Cisco router?
No collisions will occur on this link.
Rollover cable
Console interface
Router

14. What is the primary function of encapsulating packets into frames?
Create signals that represent the bits in each frame for the media.
No collisions will occur on this link.
To facilitate the entry and exit of data on media.
Network Media Control

15. 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
The destination host address.
It provides interface between applications on either end of the network.
Is a layer of specific encapsulation.

16. What type of routing uses information that is manually entered into the routing table?
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
Next-Hop Address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

17. Where is the IOS file stored at?
Flash
Twisting of the cables
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
They must wait until the first hosts finish transfering the media.

18. What do end devices do?
Originate data flow.
A. perform degradation b. security issues c. host identification
Network Access
As the commands are entered.

19. 3 features that allow TCP to realibly and accurately track the transmission of data
Host A
A. flow control b. session establishment c. numbering and sequencing
A random delay helps prevent the stations from experiencing another collision during transmission.
As the commands are entered.

20. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. flow control b. session establishment c. numbering and sequencing
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Host A
Logical Link Control sublayer

21. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
To enable a receiving host to forward the data to the appropriate application.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
DNS

22. 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
A random delay helps prevent the stations from experiencing another collision during transmission.
Hub
Static

23. 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?
A. low overhead b. connectionless
A default gateway (router).
Host A
Show Interfaces

24. What are 2 forms of application layer software?
Hosts return to listen-before-transmit mode.
Destination is not contacted before a packet is sent.
MAC
A. application b. services

25. 2 features that make switches preferable to hubs
A. netstat -r b. route PRINT
A. minimizing of collisions b. division into broadcast domains
A. media sharing b. logical topology
Supports error detection.

26. What is the primary rope of the physical layer in transmitting data?
Console interface
When connecting a host to a switch.
A. physical layer b. DLL layer
Create signals that represent the bits in each frame for the media.

27. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Create signals that represent the bits in each frame for the media.
0 to 1023
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Destination Network Address

28. What is a characteristic of a logical point-to-point topology?
The address of the router that the host will use to 'get to the other side'.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
The MAC protocol can be very simple.
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

29. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Binary ANDing
A. performance degradation b. security issues c. host identification
0 to 1023

30. What is a protocol that provides connectionless network layer services?
IP Protocol
A. router b. firewall
A. copper UTP b. optical fiber
Source and Destination IP address

31. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
It provides for the exchange of data over a common local media.
A. netstat -r b. route PRINT
Destination is not contacted before a packet is sent.

32. 3 functions of the upper data link sublayer in the OSI model
Ctrl + Shift + 6
Hub
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

33. 3 statements about the role of routers in the network
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Router(config)# interface FastEthernet 0/1
Rollover cable

34. Which type of cable is most often associated w/ fiber-optic cable?
Transport
A backbone cable.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

35. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
MAC
Is a layer of specific encapsulation.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

36. What is dinamically selected by the source host when forwarding data?
Source Port
A. copper UTP b. optical fiber
0 to 1023
MAC

37. 3 properties of peer-2-peer applications
Router(config)# hostname Costas
A. HTTP b. HTTPS
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
A. identifies the communicating applications b. identifies multiple conversations between the hosts

38. Why are port numbers included in the TCP header of a segment?
It provides for the exchange of data over a common local media.
To enable a receiving host to forward the data to the appropriate application.
A. next-hop b. metric/interface c. destination network address
A. flow control b. session establishment c. numbering and sequencing

39. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
RJ-45
Physical
Switch
A. netstat -r b. route PRINT

40. 2 characteristics of peer-2-peer
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
255.255.255.0
SSH
A. decentralized resources b. resource sharing w/o a dedicated server

41. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
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
Hub
A default gateway (router).
2046

42. What is the function of the DLL?
A. decentralized resources b. resource sharing w/o a dedicated server
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
To prevent the receiver from being overwhelmed by incoming data.
It provides for the exchange of data over a common local media.

43. 3 primary functions of the data link layer encapsulation
It has expanded adressing capabilities.
A. addressing b. error detection c. frame delimiting
RJ-45
It provides for the exchange of data over a common local media.

44. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
0 to 1023
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
To enable a receiving host to forward the data to the appropriate application.

45. What can you identify when you examine the Network Layer header?
A. HTTP b. HTTPS
The destination host address.
The packets will be delivered and reassembled at destination.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

46. What method of signal transmission uses radio waves to carry signals?
Wireless
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 physical address is added.
Router

47. What statements describe the logical token-passing topology?
Window Size
It has expanded adressing capabilities.
Any device whose backoff timer expires first.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

48. 3 features of IPv6
Identify processes or services that are communicating with end devices.
A. DB 60 b. Winchester 15-pin c. smart serial
A. larger address space b. data types and classes of service c. authentication and encryption
MAC

49. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
SSH
255.255.255.0
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
MAC

50. Which device is used to create or divide broadcast domains?
Router
80 (HTTP)
A. router b. firewall
A. HTTP b. HTTPS

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CCNA - 2

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