Test your basic knowledge |

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?
Source and Destination IP address
Originate data flow.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Switch

2. 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
MAC
A physical topology.
A. purpose b. geographic location c. ownership

3. What is the primary purpose of Layer 4?
A. enable mode b. priviledge executive mode
Identify processes or services that are communicating with end devices.
The packets will be delivered and reassembled at destination.
Source and Destination IP address

4. 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)
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 default gateway (router).
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

5. statements of IP adressing
OTDR
Destination is not contacted before a packet is sent.
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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

6. How does the application layer on a server process multiple client requests for services?
Host A
It uses support from the lower layers to distinguish between connections to the service.
They must wait until the first hosts finish transfering the media.
Hosts return to listen-before-transmit mode.

7. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network Access
Network Layer Packet
A. identifies the communicating applications b. identifies multiple conversations between the hosts

8. 3 common problems w/ a large network
A. hot keys b. context-sensitive c. command syntax check
Create signals that represent the bits in each frame for the media.
A. performance degradation b. security issues c. host identification
A random delay helps prevent the stations from experiencing another collision during transmission.

9. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
It reduces unnecessary broadcasts.
A physical topology.
Ctrl + Shift + 6

10. 3 facts about the network portion of an IPv4 address
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Source and Destination IP address
Ctrl + Shift + 6
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

11. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
A. it has centralized administration b. security is easier to enforce
A. media sharing b. logical topology
It uses support from the lower layers to distinguish between connections to the service.

12. What is the primary function of encapsulating packets into frames?
A. addressing b. error detection c. frame delimiting
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
To facilitate the entry and exit of data on media.

13. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
Destination Network Address

14. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. larger address space b. data types and classes of service c. authentication and encryption
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. hot keys b. context-sensitive c. command syntax check

15. What is a component of a routing table entry?
A. physical layer b. DLL layer
Next-Hop Address
A. Physical b. Data Link
A physical topology.

16. If you have a small network w/ 3 computers...
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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
Collisions can decrease network performance.
It uses support from the lower layers to distinguish between connections to the service.

17. 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?
IP is not properly installed
Host A
A. Physical b. Data Link
A. perform degradation b. security issues c. host identification

18. What are 2 forms of application layer software?
A. servers b. routers c. network printers
A. application b. services
It uses support from the lower layers to distinguish between connections to the service.
Host A

19. 3 statements about the role of routers in the network
A. router b. firewall
A. copper UTP b. optical fiber
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

20. What can get you to an outside network?
A default gateway (router).
It does not support encryption.
It provides for the exchange of data over a common local media.
Source Port

21. 3 protocols that operate in the application layer
Console
A. DNS b. SMTP c. POP
Source and Destination Ports
172.16.192.160

22. What command can be used to determine if the router has experienced any input or output errors?
A. flow control b. session establishment c. numbering and sequencing
It does not support encryption.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Show Interfaces

23. What are 3 common problems w/ large networks?
The physical address is added.
A. perform degradation b. security issues c. host identification
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Wireless

24. 3 factors that should be considered when implementing Layer 2 protocols
A. Physical b. Data Link
A. minimizing of collisions b. division into broadcast domains
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
8

25. What are 3 pieces of info about a route contained in a routing table?
A. MTA b. SMTP
A default gateway (router).
It uses lasers as the light source.
A. next-hop b. metric/interface c. destination network address

26. What application layer protocol is used to support file transfers between client and server?
A. netstat -r b. route PRINT
FTP
255.255.255.0
The packets will be delivered and reassembled at destination.

27. 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.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

28. What type of network cable is used between a terminal and a console port?
Rollover cable
A. physical layer b. DLL layer
OTDR
TCP initializes the sequence numbers for the sessions.

29. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
DNS
Any device whose backoff timer expires first.
Destination Network Address
A. performance degradation b. security issues c. host identification

30. What describes the purpose of default route?
Router(config)# hostname Costas
RJ-45
Network Media Control
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

31. What are 2 features of User Diagram Protocol (UDP)?
Supports error detection.
Transport
To prevent the receiver from being overwhelmed by incoming data.
A. low overhead b. connectionless

32. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Rollover cable
Any device whose backoff timer expires first.
Twisting of the cables
Network address

33. Intermediary devices used to implement security between networks
RJ-45
A. non-deterministic b. less overhead c. collisions exist
A. router b. firewall
A. flow control b. session establishment c. numbering and sequencing

34. Where is the IOS file stored at?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The MAC protocol can be very simple.
As the commands are entered.
Flash

35. During a TCP session - if packets arrive out of order - what will happen?
255.255.255.0
Flash
A. it has centralized administration b. security is easier to enforce
The packets will be delivered and reassembled at destination.

36. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. DNS b. SMTP c. POP
The destination host address.
0 to 1023
IP Protocol

37. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. Physical b. Data Link
A. minimizing of collisions b. division into broadcast domains
RJ-45

38. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. addressing b. error detection c. frame delimiting
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

39. 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.
MAC
When connecting a host to a switch.
To prevent the receiver from being overwhelmed by incoming data.

40. What is the primary purpose of ARP?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Resolve IPv4 addresses to MAC addresses.
8
Static

41. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Minimal delays in data delivery.
Static
It has expanded adressing capabilities.

42. What determines the method of media access control?
A. media sharing b. logical topology
Binary ANDing
8
It reduces unnecessary broadcasts.

43. What do you need to use for an initial configuration on a Cisco router?
Console interface
Transport
255.255.255.224
Identify the device that allows local network computers to communicate w/ devices in other networks.

44. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
A. hot keys b. context-sensitive c. command syntax check
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. minimizing of collisions b. division into broadcast domains

45. 2 characteristics of clients in data networks
A. addressing b. error detection c. frame delimiting
A. router b. firewall
Next-Hop Address
A. they initiate data exchanges b. they may upload data to servers

46. Which layer supplies services and allows user interface?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Rollover cable
A physical topology.
Application Layer

47. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. HTTP b. HTTPS
0 to 1023
A physical topology.

48. 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?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
They must wait until the first hosts finish transfering the media.
To prevent the receiver from being overwhelmed by incoming data.

49. After an ethernet collision - which device has priority to transmit data?
Resolve IPv4 addresses to MAC addresses.
Router(config)# interface FastEthernet 0/1
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Any device whose backoff timer expires first.

50. What layer encapsulates segments into packets?
Network Access
Host A
255.255.255.224
Network Layer