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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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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 command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. DNS b. SMTP c. POP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Identify processes or services that are communicating with end devices.

2. Which IP packet field will prevent endless loops?
A. servers b. routers c. network printers
Time-to-live (TTL)
Resolve IPv4 addresses to MAC addresses.
A default gateway (router).

3. Which type of cable is most often associated w/ fiber-optic cable?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A backbone cable.
Network Layer Packet
A. servers b. routers c. network printers

4. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. application b. services
255.255.255.0
UDP

5. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
Source and Destination Ports
When connecting a host to a switch.
Static

6. After an ethernet collision - which device has priority to transmit data?
Is a layer of specific encapsulation.
Identify processes or services that are communicating with end devices.
A. it has centralized administration b. security is easier to enforce
Any device whose backoff timer expires first.

7. Which portion of the network layer address does a router use to forward packets?
Network portion
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. addressing b. error detection c. frame delimiting

8. statements of IP adressing
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
Destination Network Address
2046
255.255.255.224

9. What information is added during encapsulation at OSI Layer 3?
RJ-45
Source and Destination IP address
Network portion
A. HTTP b. HTTPS

10. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
8
Router(config)# interface FastEthernet 0/1
Destination Network Address
A. router b. firewall

11. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. DNS b. SMTP c. POP

12. 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?
Static
The MAC protocol can be very simple.
Network address
2046

13. What is the primary function of encapsulating packets into frames?
Router(config)# interface FastEthernet 0/1
Binary ANDing
To prevent the receiver from being overwhelmed by incoming data.
To facilitate the entry and exit of data on media.

14. What layer encapsulates segments into packets?
IP Protocol
Network Layer
It reduces unnecessary broadcasts.
A. router b. firewall

15. What is an automated service that matches resource names w/ required IP addresses?
Is used by the server to resolve names.
IP Protocol
DNS
A. purpose b. geographic location c. ownership

16. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. application b. presentation c. session d. transmision e. network f. data link g. physical
The packets will be delivered and reassembled at destination.
Ctrl + Shift + 6

17. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
It does not support encryption.
Transport
SSH

18. What device can check for faults - integrity and performance of media?
A. copper UTP b. optical fiber
OTDR
The MAC protocol can be very simple.
Destination is not contacted before a packet is sent.

19. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Source and Destination IP address
It provides interface between applications on either end of the network.

20. What is a default gateway address?

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21. When do changes take effect in a Cisco router?
As the commands are entered.
It reduces unnecessary broadcasts.
A. HTTP b. HTTPS
Switch

22. What causes crosstalk within cable pairs when using UTP?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Rollover cable
The magnetic field around the adjacent pairs of wire.
The physical address is added.

23. At which layers of the OSI model does ethernet operate?
A backbone cable.
Host mobility
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. physical layer b. DLL layer

24. Which combination of keys can be used to interrupt a ping or traceroute process?
Router(config)# hostname Costas
Ctrl + Shift + 6
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 and Destination IP address

25. Statements that describe LAN
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 backbone cable.
To enable a receiving host to forward the data to the appropriate application.
A. application b. services

26. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Wireless
SMB
Minimal delays in data delivery.
Logical Link Control sublayer

27. 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?
Create signals that represent the bits in each frame for the media.
8
172.16.192.160
A. decentralized resources b. resource sharing w/o a dedicated server

28. Important characteristic of UDP
Minimal delays in data delivery.
To enable a receiving host to forward the data to the appropriate application.
A. HTTP b. HTTPS
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

29. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
A. larger address space b. data types and classes of service c. authentication and encryption
Next-Hop Address
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

30. 2 characteristics of peer-2-peer
Signal loss can be experienced.
A. decentralized resources b. resource sharing w/o a dedicated server
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. copper UTP b. optical fiber

31. What correctly describes a MAC address?
A. Cat5 UTP b. Cat6 UTP
A. flow control b. session establishment c. numbering and sequencing
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It has expanded adressing capabilities.

32. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
IP is not properly installed
A. not affected by EMI of RFI b. most expensive type of LAN cabling
32 bits

33. What is the purpose of a default gateway?
Is used by the server to resolve names.
Identify the device that allows local network computers to communicate w/ devices in other networks.
UTP
The destination host address.

34. What are 2 commands used to view a host routing table?
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
Wireless
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.

35. Which 2 options represent Layer 4 addressing?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The destination host address.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
MAC

36. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
FTP
A. addressing b. error detection c. frame delimiting
As the commands are entered.

37. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
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
0 to 1023
A. perform degradation b. security issues c. host identification
Window Size

38. What kind of problems are caused by excessive broadcast traffic on network segments?
Transport
Destination is not contacted before a packet is sent.
Router(config)# interface FastEthernet 0/1
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

39. 2 characteristics of clients in data networks
Network address
255.255.255.224
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. they initiate data exchanges b. they may upload data to servers

40. What 2 type of cables would most commonly be used for new runs?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
MAC
A. Cat5 UTP b. Cat6 UTP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

41. 3 properties of peer-2-peer applications
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Next-Hop Address
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
Console

42. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. DB 60 b. Winchester 15-pin c. smart serial
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

43. Which layer supplies services and allows user interface?
255.255.255.0
Network address
Application Layer
172.16.192.160

44. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A random delay helps prevent the stations from experiencing another collision during transmission.
Fiber
Signal loss can be experienced.
TCP initializes the sequence numbers for the sessions.

45. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A physical topology.
Create signals that represent the bits in each frame for the media.
To facilitate the entry and exit of data on media.

46. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
To facilitate the entry and exit of data on media.
IP is not properly installed

47. 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. flow control b. session establishment c. numbering and sequencing
A. they initiate data exchanges b. they may upload data to servers
80 (HTTP)
Originate data flow.

48. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
2046
Logical Link Control sublayer
Network Layer Packet
It does not support encryption.

49. What can get you to an outside network?
Time-to-live (TTL)
A. flow control b. session establishment c. numbering and sequencing
A default gateway (router).
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

50. What info is found in the TCP and UDP header info?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Source and Destination Ports
The MAC protocol can be very simple.
A. decentralized resources b. resource sharing w/o a dedicated server

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CCNA - 2

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