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. Which type of cable is most often associated w/ fiber-optic cable?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A backbone cable.
Wireless
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

2. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Signal loss can be experienced.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. it has centralized administration b. security is easier to enforce
Binary ANDing

3. 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.
Application Layer

4. 3 statements about routes and their use
Network portion
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
Network Media Control
Network

5. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
When connecting a host to a switch.
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
0 to 1023
Rollover cable

6. What are 2 protocols for transfering web resources?
Network address
OTDR
Console
A. HTTP b. HTTPS

7. What are 2 email components used to forward mail between servers?
Ctrl + Shift + 6
It provides interface between applications on either end of the network.
A. MTA b. SMTP
A. media sharing b. logical topology

8. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
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
When connecting a host to a switch.
A. show startup-config b. show running-config

9. What info is found in the TCP and UDP header info?
A. larger address space b. data types and classes of service c. authentication and encryption
FTP
Switch
Source and Destination Ports

10. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Originate data flow.
A physical topology.
To facilitate the entry and exit of data on media.

11. What is the primary purpose of ARP?
Source and Destination Ports
A. DNS b. SMTP c. POP
Resolve IPv4 addresses to MAC addresses.
A. goodput b. throughput c. bandwidth

12. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
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
TCP initializes the sequence numbers for the sessions.
172.16.192.160

13. What is the purpose of resource records in DNS?
As the commands are entered.
A physical topology.
To facilitate the entry and exit of data on media.
Is used by the server to resolve names.

14. What event occurs during the 3-way handshake?
It uses support from the lower layers to distinguish between connections to the service.
TCP initializes the sequence numbers for the sessions.
UTP
A. Cat5 UTP b. Cat6 UTP

15. What type of routing uses information that is manually entered into the routing table?
Static
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
SMB
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

16. 2 characteristics of peer-2-peer
Signal loss can be experienced.
Source Port
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. decentralized resources b. resource sharing w/o a dedicated server

17. What is dinamically selected by the source host when forwarding data?
Time-to-live (TTL)
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. router b. firewall
Source Port

18. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
Show Interfaces
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

19. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It uses lasers as the light source.
It uses support from the lower layers to distinguish between connections to the service.
A. enable mode b. priviledge executive mode
Hosts return to listen-before-transmit mode.

20. Which portion of the network layer address does a router use to forward packets?
Application Layer
Network portion
A. minimizing of collisions b. division into broadcast domains
It reduces unnecessary broadcasts.

21. What is a drawback of the CSMA/CD access method?
32 bits
A. performance degradation b. security issues c. host identification
It has expanded adressing capabilities.
Collisions can decrease network performance.

22. What characteristic of an UTP helps reduce interference?
A. show startup-config b. show running-config
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Twisting of the cables
Source and Destination IP address

23. If you have a full-duplex operational network - what can happen?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
No collisions will occur on this link.
Window Size
A. servers b. routers c. network printers

24. What kind of problems are caused by excessive broadcast traffic on network segments?
A backbone cable.
It provides interface between applications on either end of the network.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
2046

25. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
Is used by the server to resolve names.
A. enable mode b. priviledge executive mode
A. copper UTP b. optical fiber

26. Default Gateway is incorrect on the host - What is the impact on the communications?
RJ-45
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Rollover cable
A. media sharing b. logical topology

27. Intermediary devices used to implement security between networks
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. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. router b. firewall
A. MTA b. SMTP

28. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
The magnetic field around the adjacent pairs of wire.
A. larger address space b. data types and classes of service c. authentication and encryption
Window Size

29. What makes fiber preferable to copper for interconnecting buildings?
A. Physical b. Data Link
A. show startup-config b. show running-config
Destination is not contacted before a packet is sent.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

30. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. Cat5 UTP b. Cat6 UTP
Network
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It has expanded adressing capabilities.

31. 3 facts about the network portion of an IPv4 address
Twisting of the cables
A. media sharing b. logical topology
A default gateway (router).
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

32. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Console
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
80 (HTTP)

33. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. router b. firewall
A. flow control b. session establishment c. numbering and sequencing
Window Size
To prevent the receiver from being overwhelmed by incoming data.

34. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
A default gateway (router).
A. copper UTP b. optical fiber
IP is not properly installed

35. What do end devices do?
32 bits
SSH
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
Originate data flow.

36. 3 primary functions of the data link layer encapsulation
Show Interfaces
A. addressing b. error detection c. frame delimiting
Rollover cable
Router(config)# interface FastEthernet 0/1

37. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
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
Is a layer of specific encapsulation.
A default gateway (router).

38. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.0
SSH
255.255.255.224
8

39. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
FTP
A. non-deterministic b. less overhead c. collisions exist
Router(config)# interface FastEthernet 0/1

40. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
The destination host address.
A. physical layer b. DLL layer
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Network address

41. What is the primary function of encapsulating packets into frames?
Logical Link Control sublayer
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. it has centralized administration b. security is easier to enforce
To facilitate the entry and exit of data on media.

42. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Wireless
UTP
Destination Network Address
Resolve IPv4 addresses to MAC addresses.

43. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

44. At which layer of the TCP/IP model does ethernet operate?
32 bits
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Network Access
Source Port

45. What layer encapsulates segments into packets?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Logical Link Control sublayer
Network Layer
Source and Destination Ports

46. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
A. it has centralized administration b. security is easier to enforce
A. Cat5 UTP b. Cat6 UTP
Host mobility

47. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Twisting of the cables
172.16.192.160
A. enable mode b. priviledge executive mode
Ctrl + Shift + 6

48. Important characteristic of UDP
Minimal delays in data delivery.
UTP
Console interface
Identify processes or services that are communicating with end devices.

49. What is a component of a routing table entry?
Hosts return to listen-before-transmit mode.
Next-Hop Address
A. larger address space b. data types and classes of service c. authentication and encryption
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

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