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 OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Resolve IPv4 addresses to MAC addresses.
It provides interface between applications on either end of the network.
Hub

2. Network Protocols
The packets will be delivered and reassembled at destination.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Rollover cable
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

3. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
Is used by the server to resolve names.
A. Physical b. Data Link
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

4. In business LANs - which connector is used w/ twisted-pair networking cable?
MAC
RJ-45
A. router b. firewall
To prevent the receiver from being overwhelmed by incoming data.

5. What is the purpose of the TCP/IP Network Application Layer?
It provides for the exchange of data over a common local media.
A. decentralized resources b. resource sharing w/o a dedicated server
Network Media Control
80 (HTTP)

6. How does the application layer on a server process multiple client requests for services?
A. enable mode b. priviledge executive mode
It uses support from the lower layers to distinguish between connections to the service.
A. DB 60 b. Winchester 15-pin c. smart serial
Show Interfaces

7. What layer encapsulates segments into packets?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Layer
A. identifies the communicating applications b. identifies multiple conversations between the hosts
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

8. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
IP is not properly installed
MAC
Destination Network Address
Fiber

9. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
It does not support encryption.
Collisions can decrease network performance.
A. Physical b. Data Link
FTP

10. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
A. enable mode b. priviledge executive mode
A. Cat5 UTP b. Cat6 UTP
A. identifies the communicating applications b. identifies multiple conversations between the hosts
8

11. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. replace a switch w/ a router b. subnet the new networks
A. router b. firewall
It reduces unnecessary broadcasts.
Supports error detection.

12. Which device is used to create or divide broadcast domains?
A. DB 60 b. Winchester 15-pin c. smart serial
A. DNS b. SMTP c. POP
SSH
Router

13. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. non-deterministic b. less overhead c. collisions exist
A. show startup-config b. show running-config
A. goodput b. throughput c. bandwidth

14. 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
A. addressing b. error detection c. frame delimiting
The magnetic field around the adjacent pairs of wire.
A. servers b. routers c. network printers

15. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
To facilitate the entry and exit of data on media.
A random delay helps prevent the stations from experiencing another collision during transmission.
It provides interface between applications on either end of the network.

16. In a connectionless system - What is correct?
A. purpose b. geographic location c. ownership
OTDR
A. larger address space b. data types and classes of service c. authentication and encryption
Destination is not contacted before a packet is sent.

17. What command is used to change the default name to 'Costas'?
2046
Router(config)# hostname Costas
A backbone cable.
Is a layer of specific encapsulation.

18. What kind of problems are caused by excessive broadcast traffic on network segments?
255.255.255.0
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Collisions can decrease network performance.
The address of the router that the host will use to 'get to the other side'.

19. 3 primary functions of the data link layer encapsulation
Application Layer
Resolve IPv4 addresses to MAC addresses.
A. addressing b. error detection c. frame delimiting
A. purpose b. geographic location c. ownership

20. 3 properties of peer-2-peer applications
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network portion
A. copper UTP b. optical fiber
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

21. What is PDU?
Console
Is a layer of specific encapsulation.
2046
Originate data flow.

22. What is a disadvantage of Telnet?
The destination host address.
It does not support encryption.
80 (HTTP)
SSH

23. If you have a full-duplex operational network - what can happen?
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
32 bits
No collisions will occur on this link.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

24. What are 2 forms of application layer software?
The MAC protocol can be very simple.
Source and Destination IP address
A. Physical b. Data Link
A. application b. services

25. 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.
They must wait until the first hosts finish transfering the media.
A. decentralized resources b. resource sharing w/o a dedicated server
SSH

26. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Minimal delays in data delivery.
A. application b. services
Originate data flow.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

27. How many bits make up an IPv4 address?
OTDR
Console
DNS
32 bits

28. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
IP Protocol
UDP
DNS

29. statements of IP adressing
The MAC protocol can be very simple.
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
SMB
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

30. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
TCP initializes the sequence numbers for the sessions.
It uses support from the lower layers to distinguish between connections to the service.
Binary ANDing
Host A

31. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
The packets will be delivered and reassembled at destination.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Application Layer

32. What is the primary purpose of Layer 4?
FTP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Any device whose backoff timer expires first.
Identify processes or services that are communicating with end devices.

33. What networking devices are recommended to be assigned static IP addresses?
Network portion
A. servers b. routers c. network printers
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# interface FastEthernet 0/1

34. 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?
A. addressing b. error detection c. frame delimiting
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
Destination is not contacted before a packet is sent.
2046

35. What event occurs during the 3-way handshake?
Binary ANDing
0 to 1023
A. next-hop b. metric/interface c. destination network address
TCP initializes the sequence numbers for the sessions.

36. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
It has expanded adressing capabilities.
SMB
A. media sharing b. logical topology

37. To make a console connection from a comp to a Cisco router - what cable should be used?
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Flash

38. What information is added during encapsulation at OSI Layer 3?
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
SMB
Source and Destination IP address
A. non-deterministic b. less overhead c. collisions exist

39. When do changes take effect in a Cisco router?
Supports error detection.
A. performance degradation b. security issues c. host identification
Network Layer Packet
As the commands are entered.

40. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. minimizing of collisions b. division into broadcast domains
Destination is not contacted before a packet is sent.
To enable a receiving host to forward the data to the appropriate application.

41. 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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
80 (HTTP)
A. the router will discard the packet b. the router will send a time exceeded message to the source host

42. What are 2 protocols for transfering web resources?
Switch
255.255.255.224
A. HTTP b. HTTPS
Hub

43. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Hub
80 (HTTP)
A. non-deterministic b. less overhead c. collisions exist
DNS

44. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
32 bits
Supports error detection.
A. netstat -r b. route PRINT

45. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Network portion
Hosts return to listen-before-transmit mode.
A physical topology.
A. replace a switch w/ a router b. subnet the new networks

46. Which portion of the network layer address does a router use to forward packets?
Router(config)# hostname Costas
A. servers b. routers c. network printers
It provides for the exchange of data over a common local media.
Network portion

47. An admin needs to keep contents private - which access method should he use?
The address of the router that the host will use to 'get to the other side'.
To prevent the receiver from being overwhelmed by incoming data.
SSH
A random delay helps prevent the stations from experiencing another collision during transmission.

48. Why is flow control used for TCP data transfer?
When connecting a host to a switch.
UTP
To prevent the receiver from being overwhelmed by incoming data.
A. performance degradation b. security issues c. host identification

49. What is a default gateway address?

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50. Which layer supplies services and allows user interface?
DNS
A. flow control b. session establishment c. numbering and sequencing
Application Layer
UDP