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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. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Ctrl + Shift + 6
IP is not properly installed

2. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Hosts return to listen-before-transmit mode.
8

3. 2 characteristics of peer-2-peer
80 (HTTP)
A. decentralized resources b. resource sharing w/o a dedicated server
255.255.255.224
The physical address is added.

4. What is the primary rope of the physical layer in transmitting data?
FTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Create signals that represent the bits in each frame for the media.
A default gateway (router).

5. What is the proper order of the OSI Layers?
Fiber
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Host mobility
The MAC protocol can be very simple.

6. What is a component of a routing table entry?
Next-Hop Address
It has expanded adressing capabilities.
A. servers b. routers c. network printers
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

7. What makes fiber preferable to copper for interconnecting buildings?
A. media sharing b. logical topology
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
OTDR
SMB

8. What is the role of the OSI Application Layer?
A. it has centralized administration b. security is easier to enforce
Physical
To facilitate the entry and exit of data on media.
It provides interface between applications on either end of the network.

9. What info is found in the TCP and UDP header info?
Source and Destination Ports
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. goodput b. throughput c. bandwidth

10. What device can check for faults - integrity and performance of media?
Switch
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. larger address space b. data types and classes of service c. authentication and encryption
OTDR

11. Which combination of keys can be used to interrupt a ping or traceroute process?
No collisions will occur on this link.
A. next-hop b. metric/interface c. destination network address
Signal loss can be experienced.
Ctrl + Shift + 6

12. What is a disadvantage of Telnet?
It does not support encryption.
Is a layer of specific encapsulation.
Binary ANDing
Console

13. 2 features that make switches preferable to hubs
Destination Network Address
A. minimizing of collisions b. division into broadcast domains
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
UTP

14. What networking devices are recommended to be assigned static IP addresses?
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
A. servers b. routers c. network printers
172.16.192.160
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

15. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
Show Interfaces
Supports error detection.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

16. What can be a problem that is reduced by adding end-to-end addressing?
IP Protocol
A. minimizing of collisions b. division into broadcast domains
It uses support from the lower layers to distinguish between connections to the service.
It reduces unnecessary broadcasts.

17. What characteristic of an UTP helps reduce interference?
Twisting of the cables
A. hot keys b. context-sensitive c. command syntax check
It does not support encryption.
A. enable mode b. priviledge executive mode

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
The physical address is added.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
When connecting a host to a switch.
Minimal delays in data delivery.

19. What event occurs during the 3-way handshake?
255.255.255.0
A. DB 60 b. Winchester 15-pin c. smart serial
TCP initializes the sequence numbers for the sessions.
Network Layer Packet

20. What is a benefit of a WAN?
A. router b. firewall
Host mobility
SMB
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

21. What are 2 features of User Diagram Protocol (UDP)?
Source and Destination IP address
A. low overhead b. connectionless
The address of the router that the host will use to 'get to the other side'.
IP is not properly installed

22. What is the function of the DLL?
A. media sharing b. logical topology
It provides for the exchange of data over a common local media.
A. application b. services
Originate data flow.

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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Host A
32 bits
172.16.192.160

24. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Window Size
DNS
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

25. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
No collisions will occur on this link.
A backbone cable.
Binary ANDing
Rollover cable

26. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
Supports error detection.
A default gateway (router).
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

27. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. media sharing b. logical topology
A. enable mode b. priviledge executive mode
A. DNS b. SMTP c. POP
Originate data flow.

28. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It provides for the exchange of data over a common local media.
Window Size
Supports error detection.
8

29. What method of signal transmission uses radio waves to carry signals?
Source and Destination Ports
A. perform degradation b. security issues c. host identification
Wireless
A. addressing b. error detection c. frame delimiting

30. What is the purpose of resource records in DNS?
It does not support encryption.
A. performance degradation b. security issues c. host identification
A. non-deterministic b. less overhead c. collisions exist
Is used by the server to resolve names.

31. How many bits make up an IPv4 address?
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
It does not support encryption.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
32 bits

32. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. Physical b. Data Link
Destination Network Address
A. performance degradation b. security issues c. host identification

33. What are 3 common problems w/ large networks?
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. perform degradation b. security issues c. host identification
Is a layer of specific encapsulation.
To facilitate the entry and exit of data on media.

34. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
UDP
A. DNS b. SMTP c. POP
A. low overhead b. connectionless

35. 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?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. non-deterministic b. less overhead c. collisions exist
It uses support from the lower layers to distinguish between connections to the service.
172.16.192.160

36. When is a straight-through cable used in a network?
A. DNS b. SMTP c. POP
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
FTP
When connecting a host to a switch.

37. Default Gateway is incorrect on the host - What is the impact on the communications?
A. media sharing b. logical topology
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network Access
Binary ANDing

38. Which layer supplies services and allows user interface?
It uses support from the lower layers to distinguish between connections to the service.
Fiber
Originate data flow.
Application Layer

39. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
Destination is not contacted before a packet is sent.
The MAC protocol can be very simple.
A. perform degradation b. security issues c. host identification

40. What causes crosstalk within cable pairs when using UTP?
The address of the router that the host will use to 'get to the other side'.
It provides interface between applications on either end of the network.
The magnetic field around the adjacent pairs of wire.
0 to 1023

41. What are 2 protocols for transfering web resources?
8
A. HTTP b. HTTPS
Wireless
A. purpose b. geographic location c. ownership

42. What application layer protocol is used to support file transfers between client and server?
FTP
It reduces unnecessary broadcasts.
The physical address is added.
2046

43. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
It provides interface between applications on either end of the network.
A. hot keys b. context-sensitive c. command syntax check
Collisions can decrease network performance.

44. When do changes take effect in a Cisco router?
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
As the commands are entered.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Show Interfaces

45. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. larger address space b. data types and classes of service c. authentication and encryption
A. netstat -r b. route PRINT
TCP initializes the sequence numbers for the sessions.

46. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Host A
Network address
2046
A random delay helps prevent the stations from experiencing another collision during transmission.

47. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
Is a layer of specific encapsulation.
The destination host address.
A. performance degradation b. security issues c. host identification

48. What are 2 forms of application layer software?
Application Layer
A. application b. services
It provides interface between applications on either end of the network.
Rollover cable

49. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
255.255.255.0
A. they initiate data exchanges b. they may upload data to servers
Console

50. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A. perform degradation b. security issues c. host identification
Network
A. show startup-config b. show running-config

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CCNA - 2

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