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 is a protocol that provides connectionless network layer services?
Fiber
A. DB 60 b. Winchester 15-pin c. smart serial
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
IP Protocol

2. What 2 type of cables would most commonly be used for new runs?
Twisting of the cables
A. Cat5 UTP b. Cat6 UTP
The MAC protocol can be very simple.
A default gateway (router).

3. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
A. flow control b. session establishment c. numbering and sequencing
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
DNS

4. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
2046
Network Layer Packet
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. hot keys b. context-sensitive c. command syntax check

5. What event occurs during the 3-way handshake?
It reduces unnecessary broadcasts.
The magnetic field around the adjacent pairs of wire.
Rollover cable
TCP initializes the sequence numbers for the sessions.

6. When a network service fails - which port is most often used to access a router for management purposes?
SSH
Console
Network portion
Router(config)# hostname Costas

7. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It provides interface between applications on either end of the network.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

8. What networking devices are recommended to be assigned static IP addresses?
0 to 1023
A. servers b. routers c. network printers
Network
A. not affected by EMI of RFI b. most expensive type of LAN cabling

9. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
32 bits
Rollover cable
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Signal loss can be experienced.

10. 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. Physical b. Data Link
Is a layer of specific encapsulation.
A. media sharing b. logical topology

11. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. media sharing b. logical topology
A. goodput b. throughput c. bandwidth
UDP

12. What makes fiber preferable to copper for interconnecting buildings?
A. physical layer b. DLL layer
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. router b. firewall
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

13. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. show startup-config b. show running-config
It uses support from the lower layers to distinguish between connections to the service.
As the commands are entered.
A random delay helps prevent the stations from experiencing another collision during transmission.

14. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The address of the router that the host will use to 'get to the other side'.
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
Hub

15. Important characteristic of UDP
Minimal delays in data delivery.
The physical address is added.
Time-to-live (TTL)
Transport

16. 3 properties of peer-2-peer applications
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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
To prevent the receiver from being overwhelmed by incoming data.
SMB

17. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
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
Flash
A. enable mode b. priviledge executive mode
A. perform degradation b. security issues c. host identification

18. What characteristic of an UTP helps reduce interference?
Source and Destination IP address
Twisting of the cables
A. application b. services
FTP

19. What is the primary function of encapsulating packets into frames?
Network Layer
Network Layer Packet
Identify the device that allows local network computers to communicate w/ devices in other networks.
To facilitate the entry and exit of data on media.

20. How many bits make up an IPv4 address?
32 bits
Twisting of the cables
The magnetic field around the adjacent pairs of wire.
Transport

21. 2 most commonly used media types in ethernet networks
It uses lasers as the light source.
A. router b. firewall
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. copper UTP b. optical fiber

22. What is dinamically selected by the source host when forwarding data?
It provides for the exchange of data over a common local media.
Source Port
A. MTA b. SMTP
A. larger address space b. data types and classes of service c. authentication and encryption

23. What is the purpose of the TCP/IP Network Application Layer?
Network address
Ctrl + Shift + 6
Network Media Control
Binary ANDing

24. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. hot keys b. context-sensitive c. command syntax check
Destination Network Address
MAC
No collisions will occur on this link.

25. What is the proper order of the OSI Layers?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
OTDR
A default gateway (router).
A. application b. presentation c. session d. transmision e. network f. data link g. physical

26. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
A. MTA b. SMTP
DNS
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

27. 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.
255.255.255.224
Network Layer Packet
Host A

28. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Host A
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
255.255.255.0
It uses support from the lower layers to distinguish between connections to the service.

29. In a connectionless system - What is correct?
A. addressing b. error detection c. frame delimiting
A. performance degradation b. security issues c. host identification
Destination is not contacted before a packet is sent.
The packets will be delivered and reassembled at destination.

30. What are 2 protocols for transfering web resources?
The packets will be delivered and reassembled at destination.
Minimal delays in data delivery.
A. HTTP b. HTTPS
A. flow control b. session establishment c. numbering and sequencing

31. If you have a small network w/ 3 computers...
They must wait until the first hosts finish transfering the media.
Network Access
Minimal delays in data delivery.
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

32. 3 protocols that operate in the application layer
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. DNS b. SMTP c. POP
SSH
A. minimizing of collisions b. division into broadcast domains

33. Network Protocols
MAC
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. hot keys b. context-sensitive c. command syntax check
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

34. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Show Interfaces
A. decentralized resources b. resource sharing w/o a dedicated server
Network portion
Hosts return to listen-before-transmit mode.

35. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
Hub
Network
A. show startup-config b. show running-config
A. larger address space b. data types and classes of service c. authentication and encryption

36. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
Rollover cable
They must wait until the first hosts finish transfering the media.
Source and Destination IP address

37. What is a characteristic of a single-mode fiber-optic cable?
Fiber
RJ-45
A. application b. services
It uses lasers as the light source.

38. 2 functions of encapsulation
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
Fiber
0 to 1023
Identify processes or services that are communicating with end devices.

39. When destination network is not in the routing table - What are 2 actions the router might take?
Router
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Static
Switch

40. If you have a full-duplex operational network - what can happen?
It has expanded adressing capabilities.
Supports error detection.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
No collisions will occur on this link.

41. What are 2 common characteristics associated w/ dynamic routing protocols?
Network address
A. router b. firewall
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

42. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
UDP
To prevent the receiver from being overwhelmed by incoming data.
Logical Link Control sublayer

43. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Destination Network Address
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
It uses lasers as the light source.

44. What determines the method of media access control?
A. application b. services
A. media sharing b. logical topology
It provides interface between applications on either end of the network.
A physical topology.

45. What command is used to change the default name to 'Costas'?
2046
Minimal delays in data delivery.
Router(config)# hostname Costas
Rollover cable

46. What is the function of the DLL?
Router
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It provides for the exchange of data over a common local media.
A. application b. services

47. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
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. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
172.16.192.160
Is a layer of specific encapsulation.

48. In business LANs - which connector is used w/ twisted-pair networking cable?
Switch
Network portion
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
RJ-45

49. What can be a problem that is reduced by adding end-to-end addressing?
A. servers b. routers c. network printers
OTDR
Physical
It reduces unnecessary broadcasts.

50. What application layer protocol is used to support file transfers between client and server?
255.255.255.224
When connecting a host to a switch.
Hub
FTP