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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. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
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
Destination Network Address
2046

2. What is a characteristic of a logical point-to-point topology?
A. Cat5 UTP b. Cat6 UTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Source and Destination Ports
The MAC protocol can be very simple.

3. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Show Interfaces
Switch
UTP

4. What type of network cable is used between a terminal and a console port?
A backbone cable.
A. flow control b. session establishment c. numbering and sequencing
The magnetic field around the adjacent pairs of wire.
Rollover cable

5. Intermediary devices used to implement security between networks
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Router(config)# hostname Costas
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. router b. firewall

6. What are 2 email components used to forward mail between servers?
Source Port
A. purpose b. geographic location c. ownership
A. MTA b. SMTP
A. Physical b. Data Link

7. 3 common problems w/ a large network
A. minimizing of collisions b. division into broadcast domains
A. performance degradation b. security issues c. host identification
80 (HTTP)
Router(config)# hostname Costas

8. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
Resolve IPv4 addresses to MAC addresses.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. minimizing of collisions b. division into broadcast domains

9. What are 3 properties of contention-based media access for a shared media?
Next-Hop Address
A. non-deterministic b. less overhead c. collisions exist
Logical Link Control sublayer
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

10. 3 statements of media acess control
The destination host address.
Fiber
Router
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

11. 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.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. non-deterministic b. less overhead c. collisions exist
A. MTA b. SMTP

12. What can be a problem that is reduced by adding end-to-end addressing?
SSH
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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 reduces unnecessary broadcasts.

13. At which layer of the TCP/IP model does ethernet operate?
Network Access
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
A. purpose b. geographic location c. ownership

14. 3 facts about the network portion of an IPv4 address
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
IP is not properly installed
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

15. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
UDP
Hub
Router(config)# interface FastEthernet 0/1
172.16.192.160

16. 3 statements about routes and their use
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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
The physical address is added.

17. 3 properties of peer-2-peer applications
Physical
Switch
Time-to-live (TTL)
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

18. What are 3 common problems w/ large networks?
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
SSH
A. minimizing of collisions b. division into broadcast domains
A. perform degradation b. security issues c. host identification

19. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
A. larger address space b. data types and classes of service c. authentication and encryption
Hosts return to listen-before-transmit mode.
UTP

20. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Rollover cable
Application Layer
A. larger address space b. data types and classes of service c. authentication and encryption
Physical

21. How does the application layer on a server process multiple client requests for services?
A default gateway (router).
A. netstat -r b. route PRINT
Network Layer Packet
It uses support from the lower layers to distinguish between connections to the service.

22. 3 protocols that operate in the application layer
A. goodput b. throughput c. bandwidth
A. decentralized resources b. resource sharing w/o a dedicated server
IP is not properly installed
A. DNS b. SMTP c. POP

23. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
The packets will be delivered and reassembled at destination.
Signal loss can be experienced.
255.255.255.0

24. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
Fiber
FTP
Any device whose backoff timer expires first.

25. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
172.16.192.160
To enable a receiving host to forward the data to the appropriate application.
Router

26. What device can check for faults - integrity and performance of media?
A. they initiate data exchanges b. they may upload data to servers
OTDR
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. replace a switch w/ a router b. subnet the new networks

27. 3 terms that define the forms of help available within the Cisco IOS
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Fiber
A. hot keys b. context-sensitive c. command syntax check
Minimal delays in data delivery.

28. What are 2 features of User Diagram Protocol (UDP)?
Minimal delays in data delivery.
Static
A. low overhead b. connectionless
The magnetic field around the adjacent pairs of wire.

29. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
IP is not properly installed
Originate data flow.
UTP
Network Layer

30. What is the primary purpose of Layer 4?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Identify processes or services that are communicating with end devices.
172.16.192.160

31. What is the primary reason for developing IPv6?
Transport
Router(config)# interface FastEthernet 0/1
FTP
It has expanded adressing capabilities.

32. 2 most commonly used media types in ethernet networks
A. application b. services
A. copper UTP b. optical fiber
To facilitate the entry and exit of data on media.
It has expanded adressing capabilities.

33. What are 2 protocols for transfering web resources?
255.255.255.224
A. HTTP b. HTTPS
The packets will be delivered and reassembled at destination.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

34. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
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
Fiber
A. show startup-config b. show running-config

35. Important characteristic of UDP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. non-deterministic b. less overhead c. collisions exist
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Minimal delays in data delivery.

36. To make a console connection from a comp to a Cisco router - what cable should be used?
Twisting of the cables
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Rollover cable
Host mobility

37. When a network service fails - which port is most often used to access a router for management purposes?
Console
Host A
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. flow control b. session establishment c. numbering and sequencing

38. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
When connecting a host to a switch.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Binary ANDing
8

39. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
They must wait until the first hosts finish transfering the media.
A. router b. firewall
Network Layer Packet

40. Which 2 options represent Layer 4 addressing?
A default gateway (router).
172.16.192.160
To enable a receiving host to forward the data to the appropriate application.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

41. What are key considering factors when grouping hosts into common networks?
Transport
A. purpose b. geographic location c. ownership
Network Media Control
UDP

42. 2 features that make switches preferable to hubs
Hosts return to listen-before-transmit mode.
A. show startup-config b. show running-config
A. minimizing of collisions b. division into broadcast domains
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

43. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
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 physical topology.
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
255.255.255.0

44. statements of IP adressing
Rollover cable
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. hot keys b. context-sensitive c. command syntax check
A. purpose b. geographic location c. ownership

45. Which device is used to create or divide broadcast domains?
Collisions can decrease network performance.
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
Router
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

46. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Flash
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Switch

47. 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. copper UTP b. optical fiber
DNS
Ctrl + Shift + 6
A. show startup-config b. show running-config

48. Where is the IOS file stored at?
Source Port
Flash
The address of the router that the host will use to 'get to the other side'.
Create signals that represent the bits in each frame for the media.

49. What is the function of the DLL?
It provides for the exchange of data over a common local media.
They must wait until the first hosts finish transfering the media.
Router(config)# hostname Costas
A. DNS b. SMTP c. POP

50. What method of signal transmission uses radio waves to carry signals?
32 bits
Wireless
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other