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. What are key considering factors when grouping hosts into common networks?
Logical Link Control sublayer
Network address
No collisions will occur on this link.
A. purpose b. geographic location c. ownership

2. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. show startup-config b. show running-config
A. DB 60 b. Winchester 15-pin c. smart serial

3. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. larger address space b. data types and classes of service c. authentication and encryption
Destination Network Address
Flash
Identify processes or services that are communicating with end devices.

4. 3 facts about the network portion of an IPv4 address
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
OTDR
The magnetic field around the adjacent pairs of wire.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

5. What event occurs during the 3-way handshake?
Router(config)# interface FastEthernet 0/1
Is a layer of specific encapsulation.
TCP initializes the sequence numbers for the sessions.
Any device whose backoff timer expires first.

6. 3 features of IPv6
Supports error detection.
It uses support from the lower layers to distinguish between connections to the service.
A. larger address space b. data types and classes of service c. authentication and encryption
Show Interfaces

7. What is an automated service that matches resource names w/ required IP addresses?
Hosts return to listen-before-transmit mode.
DNS
To enable a receiving host to forward the data to the appropriate application.
IP Protocol

8. Why are port numbers included in the TCP header of a segment?
RJ-45
Show Interfaces
To enable a receiving host to forward the data to the appropriate application.
OTDR

9. Which type of cable is most often associated w/ fiber-optic cable?
A. perform degradation b. security issues c. host identification
A backbone cable.
A. MTA b. SMTP
It has expanded adressing capabilities.

10. At which layers of the OSI model does ethernet operate?
A. low overhead b. connectionless
A. physical layer b. DLL layer
Flash
To enable a receiving host to forward the data to the appropriate application.

11. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. addressing b. error detection c. frame delimiting
Hosts return to listen-before-transmit mode.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
To prevent the receiver from being overwhelmed by incoming data.

12. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. low overhead b. connectionless
Physical
OTDR
A. Physical b. Data Link

13. What are 3 common problems w/ large networks?
32 bits
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. it has centralized administration b. security is easier to enforce
A. perform degradation b. security issues c. host identification

14. What device can check for faults - integrity and performance of media?
OTDR
Is used by the server to resolve names.
SSH
Time-to-live (TTL)

15. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Physical
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Binary ANDing
A. low overhead b. connectionless

16. 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 random delay helps prevent the stations from experiencing another collision during transmission.
A. MTA b. SMTP
They must wait until the first hosts finish transfering the media.
The physical address is added.

17. What causes crosstalk within cable pairs when using UTP?
A. replace a switch w/ a router b. subnet the new networks
The magnetic field around the adjacent pairs of wire.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Physical

18. What type of network cable is used between a terminal and a console port?
The address of the router that the host will use to 'get to the other side'.
Any device whose backoff timer expires first.
Hub
Rollover cable

19. What application layer protocol is used to support file transfers between client and server?
Destination is not contacted before a packet is sent.
FTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

20. When a device is moved from one network to the other...?
It uses support from the lower layers to distinguish between connections to the service.
A. MTA b. SMTP
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
The destination host address.

21. 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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
TCP initializes the sequence numbers for the sessions.
Is a layer of specific encapsulation.

22. 3 features that allow TCP to realibly and accurately track the transmission of data
A. hot keys b. context-sensitive c. command syntax check
A. flow control b. session establishment c. numbering and sequencing
Host A
It provides for the exchange of data over a common local media.

23. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
A. low overhead b. connectionless
UDP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

24. What do you need to use for an initial configuration on a Cisco router?
Console interface
TCP initializes the sequence numbers for the sessions.
Static
A. DB 60 b. Winchester 15-pin c. smart serial

25. After an ethernet collision - which device has priority to transmit data?
A. purpose b. geographic location c. ownership
Fiber
Any device whose backoff timer expires first.
It provides for the exchange of data over a common local media.

26. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
TCP initializes the sequence numbers for the sessions.
A. DB 60 b. Winchester 15-pin c. smart serial
Source and Destination Ports

27. What are 2 protocols for transfering web resources?
A. perform degradation b. security issues c. host identification
A. HTTP b. HTTPS
Network Media Control
Fiber

28. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Supports error detection.

29. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
Logical Link Control sublayer
It does not support encryption.
A. physical layer b. DLL layer

30. What is the purpose of resource records in DNS?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Is used by the server to resolve names.
8
The magnetic field around the adjacent pairs of wire.

31. Which portion of the network layer address does a router use to forward packets?
172.16.192.160
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Host mobility
Network portion

32. Important characteristic of UDP
A. application b. services
Physical
Twisting of the cables
Minimal delays in data delivery.

33. Network Protocols
Supports error detection.
It reduces unnecessary broadcasts.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
The magnetic field around the adjacent pairs of wire.

34. Which combination of keys can be used to interrupt a ping or traceroute process?
Twisting of the cables
It has expanded adressing capabilities.
Ctrl + Shift + 6
A random delay helps prevent the stations from experiencing another collision during transmission.

35. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Window Size
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. 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
UTP

36. What do end devices do?
A. media sharing b. logical topology
Network
Destination is not contacted before a packet is sent.
Originate data flow.

37. 2 functions of encapsulation
FTP
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
It has expanded adressing capabilities.
Physical

38. What is a disadvantage of Telnet?
It does not support encryption.
It provides interface between applications on either end of the network.
A. minimizing of collisions b. division into broadcast domains
A backbone cable.

39. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Router(config)# hostname Costas
UDP
A. router b. firewall
A. Cat5 UTP b. Cat6 UTP

40. Where is the IOS file stored at?
8
It provides interface between applications on either end of the network.
Binary ANDing
Flash

41. 3 primary functions of the data link layer encapsulation
Binary ANDing
Ctrl + Shift + 6
A. next-hop b. metric/interface c. destination network address
A. addressing b. error detection c. frame delimiting

42. To make a console connection from a comp to a Cisco router - what cable should be used?
Source Port
Any device whose backoff timer expires first.
Rollover cable
Hub

43. If there is a graphic representation of a company network wiring and equipment - What is this called?
To facilitate the entry and exit of data on media.
A random delay helps prevent the stations from experiencing another collision during transmission.
A physical topology.
Window Size

44. What does the IEEE 802.2 standard represent in Ethernet technologies?
Identify processes or services that are communicating with end devices.
Logical Link Control sublayer
It has expanded adressing capabilities.
A. flow control b. session establishment c. numbering and sequencing

45. What are 3 properties of contention-based media access for a shared media?
Is used by the server to resolve names.
A. non-deterministic b. less overhead c. collisions exist
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
TCP initializes the sequence numbers for the sessions.

46. Intermediary devices used to implement security between networks
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Create signals that represent the bits in each frame for the media.
A. router b. firewall
A. goodput b. throughput c. bandwidth

47. What is the purpose of the preamble in an ethernet frame?
Router(config)# hostname Costas
255.255.255.224
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. they initiate data exchanges b. they may upload data to servers

48. 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?
Window Size
Host mobility
Binary ANDing
8

49. What is a component of a routing table entry?
Show Interfaces
The destination host address.
Network Media Control
Next-Hop Address

50. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
2046
Host A
A random delay helps prevent the stations from experiencing another collision during transmission.
The physical address is added.