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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. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
32 bits
Network Layer Packet
Switch

2. What networking devices are recommended to be assigned static IP addresses?
Physical
A. servers b. routers c. network printers
It does not support encryption.
A. netstat -r b. route PRINT

3. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Hosts return to listen-before-transmit mode.
Rollover cable
UDP
IP Protocol

4. What describes the purpose of default route?
Is a layer of specific 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
UDP
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

5. How many bits make up an IPv4 address?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
32 bits
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
2046

6. What is a benefit of a WAN?
Physical
To enable a receiving host to forward the data to the appropriate application.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host mobility

7. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. DB 60 b. Winchester 15-pin c. smart serial

8. 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. application b. services
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Host mobility

9. Which portion of the network layer address does a router use to forward packets?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. goodput b. throughput c. bandwidth
Network portion
172.16.192.160

10. What application layer protocol is used to support file transfers between client and server?
FTP
Flash
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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

11. An admin needs to keep contents private - which access method should he use?
A. they initiate data exchanges b. they may upload data to servers
SSH
It provides for the exchange of data over a common local media.
A. perform degradation b. security issues c. host identification

12. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
2046
The destination host address.
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

13. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Is a layer of specific encapsulation.
172.16.192.160
Network Layer Packet
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

14. statements of IP adressing
OTDR
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
2046
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

15. 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?
As the commands are entered.
A. replace a switch w/ a router b. subnet the new networks
255.255.255.0
A. show startup-config b. show running-config

16. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. physical layer b. DLL layer
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

17. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
It does not support encryption.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

18. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. netstat -r b. route PRINT
Hosts return to listen-before-transmit mode.
Flash
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

19. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
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. media sharing b. logical topology
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

20. What info is found in the TCP and UDP header info?
8
172.16.192.160
Show Interfaces
Source and Destination Ports

21. What causes crosstalk within cable pairs when using UTP?
Hub
The magnetic field around the adjacent pairs of wire.
Minimal delays in data delivery.
TCP initializes the sequence numbers for the sessions.

22. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
Binary ANDing
Fiber
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

23. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. minimizing of collisions b. division into broadcast domains
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 uses support from the lower layers to distinguish between connections to the service.
IP is not properly installed

24. What can get you to an outside network?
It does not support encryption.
The magnetic field around the adjacent pairs of wire.
Wireless
A default gateway (router).

25. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. router b. firewall
Console interface
Hub
Fiber

26. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
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
They must wait until the first hosts finish transfering the media.
No collisions will occur on this link.

27. In a connectionless system - What is correct?
A. enable mode b. priviledge executive mode
Destination is not contacted before a packet is sent.
Static
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

28. Why is flow control used for TCP data transfer?
Rollover cable
To prevent the receiver from being overwhelmed by incoming data.
A. minimizing of collisions b. division into broadcast domains
IP is not properly installed

29. 3 statements about routes and their use
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 MAC protocol can be very simple.
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. DNS b. SMTP c. POP

30. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Console
A. replace a switch w/ a router b. subnet the new networks
0 to 1023
A. enable mode b. priviledge executive mode

31. What layer encapsulates segments into packets?
255.255.255.224
Network Layer
Source and Destination Ports
A backbone cable.

32. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
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. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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

33. What is a component of a routing table entry?
Next-Hop Address
A. HTTP b. HTTPS
Signal loss can be experienced.
Host mobility

34. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Application Layer
TCP initializes the sequence numbers for the sessions.
A. performance degradation b. security issues c. host identification
Physical

35. Why are port numbers included in the TCP header of a segment?
Is a layer of specific encapsulation.
To enable a receiving host to forward the data to the appropriate application.
Host mobility
255.255.255.0

36. 2 features that make switches preferable to hubs
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
When connecting a host to a switch.
Network Media Control
A. minimizing of collisions b. division into broadcast domains

37. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. goodput b. throughput c. bandwidth
A. enable mode b. priviledge executive mode
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. non-deterministic b. less overhead c. collisions exist

38. What type of routing uses information that is manually entered into the routing table?
Static
Rollover cable
A. application b. presentation c. session d. transmision e. network f. data link g. physical
FTP

39. At which layer of the TCP/IP model does ethernet operate?
Wireless
A. non-deterministic b. less overhead c. collisions exist
Network Access
Window Size

40. 3 common problems w/ a large network
It uses lasers as the light source.
A. performance degradation b. security issues c. host identification
Hosts return to listen-before-transmit mode.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

41. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Static
Network portion
Router(config)# interface FastEthernet 0/1
A. addressing b. error detection c. frame delimiting

42. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
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 physical topology.
Source Port

43. Which type of cable is most often associated w/ fiber-optic cable?
RJ-45
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
It reduces unnecessary broadcasts.
A backbone cable.

44. What are 2 common characteristics associated w/ dynamic routing protocols?
A. Cat5 UTP b. Cat6 UTP
The destination host address.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

45. What is PDU?
Is a layer of specific encapsulation.
Host A
It reduces unnecessary broadcasts.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

46. 3 properties of peer-2-peer applications
The packets will be delivered and reassembled at destination.
A. netstat -r b. route PRINT
A. servers b. routers c. network printers
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

47. 3 primary functions of the data link layer encapsulation
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Any device whose backoff timer expires first.
A. addressing b. error detection c. frame delimiting
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

48. What do you need to use for an initial configuration on a Cisco router?
Network address
IP Protocol
Signal loss can be experienced.
Console interface

49. What is a drawback of the CSMA/CD access method?
MAC
Collisions can decrease network performance.
A backbone cable.
TCP initializes the sequence numbers for the sessions.

50. What is a characteristic of a logical point-to-point topology?
A. it has centralized administration b. security is easier to enforce
The MAC protocol can be very simple.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. servers b. routers c. network printers