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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. If you have a small network w/ 3 computers...
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. next-hop b. metric/interface c. destination network address
It uses lasers as the light source.
A. netstat -r b. route PRINT

2. 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. goodput b. throughput c. bandwidth
255.255.255.0
8
Collisions can decrease network performance.

3. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Fiber
255.255.255.0
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
IP is not properly installed

4. Why are port numbers included in the TCP header of a segment?
Any device whose backoff timer expires first.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
To enable a receiving host to forward the data to the appropriate application.
A. next-hop b. metric/interface c. destination network address

5. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Hub
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The magnetic field around the adjacent pairs of wire.

6. What is PDU?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A physical topology.
Is a layer of specific encapsulation.
Network portion

7. 3 properties of peer-2-peer applications
A physical topology.
Create signals that represent the bits in each frame for the media.
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
It has expanded adressing capabilities.

8. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
As the commands are entered.
A. media sharing b. logical topology

9. Statements that describe LAN
A. DB 60 b. Winchester 15-pin c. smart serial
A. they initiate data exchanges b. they may upload data to servers
Is used by the server to resolve names.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

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

11. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. perform degradation b. security issues c. host identification
A. addressing b. error detection c. frame delimiting
Binary ANDing

12. What info is found in the TCP and UDP header info?
Source and Destination Ports
Network
OTDR
The physical address is added.

13. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
SSH
SMB
Supports error detection.
A. HTTP b. HTTPS

14. What is dinamically selected by the source host when forwarding data?
Host A
SSH
Collisions can decrease network performance.
Source Port

15. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
UDP
Hub
To enable a receiving host to forward the data to the appropriate application.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

16. What can be a problem that is reduced by adding end-to-end addressing?
A. media sharing b. logical topology
Rollover cable
Network Media Control
It reduces unnecessary broadcasts.

17. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. show startup-config b. show running-config
Network

18. statements of IP adressing
Hub
UDP
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 default gateway (router).

19. What is the proper order of the OSI Layers?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Flash
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. application b. presentation c. session d. transmision e. network f. data link g. physical

20. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Fiber
Window Size
Network address
A. decentralized resources b. resource sharing w/o a dedicated server

21. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Network address
Collisions can decrease network performance.
Twisting of the cables

22. What is the primary purpose of ARP?
It does not support encryption.
Supports error detection.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Resolve IPv4 addresses to MAC addresses.

23. What are 2 forms of application layer software?
UTP
Router
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. application b. services

24. What information is added during encapsulation at OSI Layer 3?
A. DB 60 b. Winchester 15-pin c. smart serial
SSH
Application Layer
Source and Destination IP address

25. 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. physical layer b. DLL layer
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

26. 3 statements about routes and their use
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
Console interface
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. Cat5 UTP b. Cat6 UTP

27. What is a benefit of a WAN?
Twisting of the cables
A. perform degradation b. security issues c. host identification
Host mobility
It provides interface between applications on either end of the network.

28. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
They must wait until the first hosts finish transfering the media.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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

29. 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?
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
A. physical layer b. DLL layer
A. show startup-config b. show running-config
A. performance degradation b. security issues c. host identification

30. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. router b. firewall
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
Network Layer Packet
It has expanded adressing capabilities.

31. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
Destination is not contacted before a packet is sent.
Physical
255.255.255.0

32. 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.
Router
Collisions can decrease network performance.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

33. Which device is used to create or divide broadcast domains?
80 (HTTP)
Router
Logical Link Control sublayer
A. decentralized resources b. resource sharing w/o a dedicated server

34. 2 features that make switches preferable to hubs
A. DB 60 b. Winchester 15-pin c. smart serial
A. minimizing of collisions b. division into broadcast domains
A. enable mode b. priviledge executive mode
Network address

35. What device can check for faults - integrity and performance of media?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
OTDR
Hosts return to listen-before-transmit mode.
The physical address is added.

36. 3 facts about the network portion of an IPv4 address
A. larger address space b. data types and classes of service c. authentication and encryption
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. media sharing b. logical topology
A. flow control b. session establishment c. numbering and sequencing

37. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. Physical b. Data Link
Router(config)# interface FastEthernet 0/1
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. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

38. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
Minimal delays in data delivery.
Ctrl + Shift + 6
A. minimizing of collisions b. division into broadcast domains

39. What is the purpose of resource records in DNS?
It does not support encryption.
Is used by the server to resolve names.
Create signals that represent the bits in each frame for the media.
Originate data flow.

40. When is a straight-through cable used in a network?
Host mobility
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
When connecting a host to a switch.
Router

41. What command can be used to determine if the router has experienced any input or output errors?
Source Port
A. next-hop b. metric/interface c. destination network address
A. they initiate data exchanges b. they may upload data to servers
Show Interfaces

42. What type of network cable is used between a terminal and a console port?
Destination is not contacted before a packet is sent.
A. larger address space b. data types and classes of service c. authentication and encryption
Rollover cable
Fiber

43. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
Collisions can decrease network performance.
The magnetic field around the adjacent pairs of wire.
Any device whose backoff timer expires first.

44. What are 2 features of User Diagram Protocol (UDP)?
The MAC protocol can be very simple.
Console
A. low overhead b. connectionless
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

45. What are 2 common characteristics associated w/ dynamic routing protocols?
A. flow control b. session establishment c. numbering and sequencing
Destination Network Address
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
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

46. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Transport
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

47. What type of routing uses information that is manually entered into the routing table?
Supports error detection.
Static
They must wait until the first hosts finish transfering the media.
0 to 1023

48. 3 statements of media acess control
A. next-hop b. metric/interface c. destination network address
Any device whose backoff timer expires first.
Network 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

49. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Network Access
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
80 (HTTP)
Source and Destination IP address

50. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
172.16.192.160
OTDR
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet