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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. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
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. 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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

2. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
A. show startup-config b. show running-config
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. Physical b. Data Link

3. During encapsulation - what happens in the Data Link Layer?
The packets will be delivered and reassembled at destination.
The physical address is added.
Switch
172.16.192.160

4. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
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A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Layer

5. What is an effect of improperly applying a network cable connector?
Binary ANDing
Signal loss can be experienced.
The packets will be delivered and reassembled at destination.
Transport

6. 3 factors that should be considered when implementing Layer 2 protocols
To enable a receiving host to forward the data to the appropriate application.
They must wait until the first hosts finish transfering the media.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Source and Destination Ports

7. 3 characteristics of valid Ethernet Layer 2 addresses
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. application b. services
A. hot keys b. context-sensitive c. command syntax check

8. What can be a problem that is reduced by adding end-to-end addressing?
No collisions will occur on this link.
Is a layer of specific encapsulation.
It uses support from the lower layers to distinguish between connections to the service.
It reduces unnecessary broadcasts.

9. 3 statements about the role of routers in the network
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Signal loss can be experienced.
A. MTA b. SMTP

10. Why is flow control used for TCP data transfer?
A. purpose b. geographic location c. ownership
Application Layer
To prevent the receiver from being overwhelmed by incoming data.
255.255.255.0

11. What application layer protocol is used to support file transfers between client and server?
The address of the router that the host will use to 'get to the other side'.
FTP
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
255.255.255.224

12. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
0 to 1023
Network
Twisting of the cables

13. What is the primary purpose of ARP?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
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
Resolve IPv4 addresses to MAC addresses.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

14. What is the purpose of resource records in DNS?
A. it has centralized administration b. security is easier to enforce
Is used by the server to resolve names.
They must wait until the first hosts finish transfering the media.
A. DNS b. SMTP c. POP

15. What is a characteristic of a logical point-to-point topology?
Show Interfaces
A physical topology.
IP Protocol
The MAC protocol can be very simple.

16. What type of routing uses information that is manually entered into the routing table?
A backbone cable.
Static
A. non-deterministic b. less overhead c. collisions exist
A. media sharing b. logical topology

17. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Flash
Supports error detection.
FTP
Router

18. What is the purpose of the preamble in an ethernet frame?
A. MTA b. SMTP
Router
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
UTP

19. At which layer of the TCP/IP model does ethernet operate?
They must wait until the first hosts finish transfering the media.
A random delay helps prevent the stations from experiencing another collision during transmission.
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
Network Access

20. Intermediary devices used to implement security between networks
Is used by the server to resolve names.
A. router b. firewall
To prevent the receiver from being overwhelmed by incoming data.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

21. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
Next-Hop Address
A backbone cable.
Source Port

22. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Next-Hop Address
Router(config)# interface FastEthernet 0/1
Destination Network Address

23. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. minimizing of collisions b. division into broadcast domains
To enable a receiving host to forward the data to the appropriate application.
Destination Network Address
80 (HTTP)

24. How does the application layer on a server process multiple client requests for services?
IP Protocol
A backbone cable.
A. performance degradation b. security issues c. host identification
It uses support from the lower layers to distinguish between connections to the service.

25. What are key considering factors when grouping hosts into common networks?
A. hot keys b. context-sensitive c. command syntax check
A. purpose b. geographic location c. ownership
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
80 (HTTP)

26. After an ethernet collision - which device has priority to transmit data?
The address of the router that the host will use to 'get to the other side'.
A. netstat -r b. route PRINT
Any device whose backoff timer expires first.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

27. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. netstat -r b. route PRINT
A. larger address space b. data types and classes of service c. authentication and encryption
It provides for the exchange of data over a common local media.
A. enable mode b. priviledge executive mode

28. What is the primary function of encapsulating packets into frames?
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
Collisions can decrease network performance.
2046
To facilitate the entry and exit of data on media.

29. What connectors are commonly associated w/ Cisco's V.35 serial cables?
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Application Layer
A. DB 60 b. Winchester 15-pin c. smart serial

30. 3 statements about routes and their use
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
The destination host address.
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
It uses lasers as the light source.

31. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
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. DNS b. SMTP c. POP
DNS
Physical

32. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
As the commands are entered.
255.255.255.0
A. show startup-config b. show running-config
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

33. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
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
Window Size
The physical address is added.

34. What is the role of the OSI Application Layer?
Create signals that represent the bits in each frame for the media.
Rollover cable
It provides interface between applications on either end of the network.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

35. 3 terms that define the forms of help available within the Cisco IOS
IP Protocol
Rollover cable
A. hot keys b. context-sensitive c. command syntax check
A. addressing b. error detection c. frame delimiting

36. When a device is moved from one network to the other...?
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
FTP
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. 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

37. What device can check for faults - integrity and performance of media?
Binary ANDing
Network portion
A. perform degradation b. security issues c. host identification
OTDR

38. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Source and Destination IP address
A. DNS b. SMTP c. POP
Network portion

39. 2 most commonly used media types in ethernet networks
It provides interface between applications on either end of the network.
Transport
A. copper UTP b. optical fiber
No collisions will occur on this link.

40. What characteristic of an UTP helps reduce interference?
Twisting of the cables
255.255.255.0
A. HTTP b. HTTPS
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

41. What causes crosstalk within cable pairs when using UTP?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Source and Destination IP address
The magnetic field around the adjacent pairs of wire.
A. replace a switch w/ a router b. subnet the new networks

42. What is an automated service that matches resource names w/ required IP addresses?
DNS
A physical topology.
A. non-deterministic b. less overhead c. collisions exist
Any device whose backoff timer expires first.

43. What is dinamically selected by the source host when forwarding data?
Source Port
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. servers b. routers c. network printers

44. What statements describe the logical token-passing topology?
A. DB 60 b. Winchester 15-pin c. smart serial
A. Cat5 UTP b. Cat6 UTP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. application b. presentation c. session d. transmision e. network f. data link g. physical

45. 3 features that allow TCP to realibly and accurately track the transmission of data
To facilitate the entry and exit of data on media.
A. show startup-config b. show running-config
When connecting a host to a switch.
A. flow control b. session establishment c. numbering and sequencing

46. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Twisting of the cables
A. application b. services

47. If you have a small network w/ 3 computers...
Switch
Network Layer Packet
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

48. 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?
It provides for the exchange of data over a common local media.
They must wait until the first hosts finish transfering the media.
A. physical layer b. DLL layer
A. media sharing b. logical topology

49. What do the intermediary devices in the network do?
The address of the router that the host will use to 'get to the other side'.
Hub
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
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50. What are 2 protocols for transfering web resources?
It provides for the exchange of data over a common local media.
No collisions will occur on this link.
2046
A. HTTP b. HTTPS