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 would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Identify processes or services that are communicating with end devices.
IP is not properly installed
FTP
A. DB 60 b. Winchester 15-pin c. smart serial

2. What are 2 email components used to forward mail between servers?
Window Size
A. it has centralized administration b. security is easier to enforce
A. they initiate data exchanges b. they may upload data to servers
A. MTA b. SMTP

3. What correctly describes a MAC address?
Ctrl + Shift + 6
The address of the router that the host will use to 'get to the other side'.
Router(config)# interface FastEthernet 0/1
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

4. What is an effect of improperly applying a network cable connector?
2046
Hosts return to listen-before-transmit mode.
Originate data flow.
Signal loss can be experienced.

5. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. purpose b. geographic location c. ownership
A. enable mode b. priviledge executive mode
Router(config)# interface FastEthernet 0/1
Supports error detection.

6. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Physical
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
172.16.192.160
Hosts return to listen-before-transmit mode.

7. What info is found in the TCP and UDP header info?
255.255.255.0
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Source and Destination Ports
Network Access

8. 3 characteristics of valid Ethernet Layer 2 addresses
A. purpose b. geographic location c. ownership
As the commands are entered.
Network portion
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

9. Default Gateway is incorrect on the host - What is the impact on the communications?
It has expanded adressing capabilities.
80 (HTTP)
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Rollover cable

10. 3 protocols that operate in the application layer
A backbone cable.
FTP
A. Cat5 UTP b. Cat6 UTP
A. DNS b. SMTP c. POP

11. Intermediary devices used to implement security between networks
UDP
Static
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. router b. firewall

12. Which device is used to create or divide broadcast domains?
Create signals that represent the bits in each frame for the media.
A backbone cable.
Router
It uses support from the lower layers to distinguish between connections to the service.

13. 2 characteristics of peer-2-peer
A. minimizing of collisions b. division into broadcast domains
Ctrl + Shift + 6
A. goodput b. throughput c. bandwidth
A. decentralized resources b. resource sharing w/o a dedicated server

14. 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.
Minimal delays in data delivery.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Switch

15. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
OTDR
Physical
A. show startup-config b. show running-config
Network Layer Packet

16. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
Router(config)# hostname Costas
Ctrl + Shift + 6
Network

17. What 2 type of cables would most commonly be used for new runs?
A. enable mode b. priviledge executive mode
OTDR
A. Cat5 UTP b. Cat6 UTP
Physical

18. At which layer of the TCP/IP model does ethernet operate?
Network Access
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
It reduces unnecessary broadcasts.
Collisions can decrease network performance.

19. What is a component of a routing table entry?
No collisions will occur on this link.
It uses support from the lower layers to distinguish between connections to the service.
Next-Hop Address
Create signals that represent the bits in each frame for the media.

20. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
255.255.255.224
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Transport
A. purpose b. geographic location c. ownership

21. statements of IP adressing
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
Minimal delays in data delivery.
The magnetic field around the adjacent pairs of wire.
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

22. How many bits make up an IPv4 address?
A. minimizing of collisions b. division into broadcast domains
A. Cat5 UTP b. Cat6 UTP
They must wait until the first hosts finish transfering the media.
32 bits

23. What is a benefit of a WAN?
Rollover cable
Host mobility
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. performance degradation b. security issues c. host identification

24. What describes the purpose of default route?
Network Media Control
Fiber
Static
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

25. What are 3 common problems w/ large networks?
Supports error detection.
A. perform degradation b. security issues c. host identification
Resolve IPv4 addresses to MAC addresses.
Flash

26. What causes crosstalk within cable pairs when using UTP?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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
The magnetic field around the adjacent pairs of wire.

27. If you have a small network w/ 3 computers...
Create signals that represent the bits in each frame for the media.
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 the communicating applications b. identifies multiple conversations between the hosts
Hosts return to listen-before-transmit mode.

28. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. purpose b. geographic location c. ownership
Logical Link Control sublayer
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Source and Destination IP address

29. What are key considering factors when grouping hosts into common networks?
To facilitate the entry and exit of data on media.
A. purpose b. geographic location c. ownership
A. MTA b. SMTP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

30. 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?
0 to 1023
Source and Destination IP address
It reduces unnecessary broadcasts.
They must wait until the first hosts finish transfering the media.

31. Which 2 options represent Layer 4 addressing?
Wireless
A. they initiate data exchanges b. they may upload data to servers
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. identifies the communicating applications b. identifies multiple conversations between the hosts

32. When do changes take effect in a Cisco router?
A. show startup-config b. show running-config
As the commands are entered.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
The physical address is added.

33. What is the primary purpose of Layer 4?
A. servers b. routers c. network printers
Identify processes or services that are communicating with end devices.
A. addressing b. error detection c. frame delimiting
Host mobility

34. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
UTP
Console

35. What is an automated service that matches resource names w/ required IP addresses?
A. enable mode b. priviledge executive mode
The destination host address.
DNS
A. it has centralized administration b. security is easier to enforce

36. In a connectionless system - What is correct?
Network
Source and Destination Ports
Minimal delays in data delivery.
Destination is not contacted before a packet is sent.

37. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Create signals that represent the bits in each frame for the media.
Network Layer Packet
A. they initiate data exchanges b. they may upload data to servers
MAC

38. What is a characteristic of a single-mode fiber-optic cable?
It provides for the exchange of data over a common local media.
It uses lasers as the light source.
Host mobility
Any device whose backoff timer expires first.

39. What are 2 forms of application layer software?
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
A. application b. services
2046
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

40. When is a straight-through cable used in a network?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Binary ANDing
When connecting a host to a switch.
To enable a receiving host to forward the data to the appropriate application.

41. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
SMB
Logical Link Control sublayer
It does not support encryption.
Fiber

42. 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?
Router(config)# interface FastEthernet 0/1
A. perform degradation b. security issues c. host identification
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Host A

43. Which layer supplies services and allows user interface?
RJ-45
Window Size
Is used by the server to resolve names.
Application Layer

44. 3 statements of media acess control
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It uses support from the lower layers to distinguish between connections to the service.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

45. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Source and Destination IP address
Network Access
A random delay helps prevent the stations from experiencing another collision during transmission.
Ctrl + Shift + 6

46. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Collisions can decrease network performance.
SMB
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. copper UTP b. optical fiber

47. What are 2 features of User Diagram Protocol (UDP)?
A. they initiate data exchanges b. they may upload data to servers
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Router(config)# interface FastEthernet 0/1
A. low overhead b. connectionless

48. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Fiber
Destination Network Address
IP is not properly installed
A. flow control b. session establishment c. numbering and sequencing

49. 3 statements about routes and their use
Window Size
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
Create signals that represent the bits in each frame for the media.
172.16.192.160

50. What command can be used to determine if the router has experienced any input or output errors?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Transport
Window Size
Show Interfaces