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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 a mechanism used by TCP to provide flow control as segments travel from source to destination?
2046
Window Size
Identify the device that allows local network computers to communicate w/ devices in other networks.
8

2. During encapsulation - what happens in the Data Link Layer?
Network
Collisions can decrease network performance.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The physical address is added.

3. 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. flow control b. session establishment c. numbering and sequencing
Create signals that represent the bits in each frame for the media.
A. application b. services
A. show startup-config b. show running-config

4. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Is a layer of specific encapsulation.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
2046

5. After an ethernet collision - which device has priority to transmit data?
A. show startup-config b. show running-config
A. MTA b. SMTP
Any device whose backoff timer expires first.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

6. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
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
Network Layer
Hub
OTDR

7. Default Gateway is incorrect on the host - What is the impact on the communications?
A. next-hop b. metric/interface c. destination network address
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. hot keys b. context-sensitive c. command syntax check
Network

8. Which type of cable is most often associated w/ fiber-optic cable?
Rollover cable
Any device whose backoff timer expires first.
A backbone cable.
IP Protocol

9. What is PDU?
Binary ANDing
A. copper UTP b. optical fiber
Is a layer of specific encapsulation.
It reduces unnecessary broadcasts.

10. What is the role of the OSI Application Layer?
Source and Destination Ports
Switch
Router(config)# interface FastEthernet 0/1
It provides interface between applications on either end of the network.

11. Intermediary devices used to implement security between networks
UDP
Twisting of the cables
A. router b. firewall
A. netstat -r b. route PRINT

12. What can you identify when you examine the Network Layer header?
A. it has centralized administration b. security is easier to enforce
The destination host address.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
IP is not properly installed

13. statements of IP adressing
FTP
The magnetic field around the adjacent pairs of wire.
The MAC protocol can be very simple.
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

14. If there is a graphic representation of a company network wiring and equipment - What is this called?
255.255.255.224
A physical topology.
A. perform degradation b. security issues c. host identification
Ctrl + Shift + 6

15. What is the primary purpose of Layer 4?
To facilitate the entry and exit of data on media.
OTDR
Identify processes or services that are communicating with end devices.
Time-to-live (TTL)

16. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. next-hop b. metric/interface c. destination network address
No collisions will occur on this link.
IP is not properly installed
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

17. 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
UTP
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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

18. 3 features that allow TCP to realibly and accurately track the transmission of data
Router(config)# hostname Costas
A. flow control b. session establishment c. numbering and sequencing
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
RJ-45

19. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. larger address space b. data types and classes of service c. authentication and encryption
A. low overhead b. connectionless
SSH

20. Which portion of the network layer address does a router use to forward packets?
Minimal delays in data delivery.
Network portion
IP Protocol
Application Layer

21. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. application b. services
OTDR
IP Protocol

22. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. Physical b. Data Link
Destination Network Address
Hub
Hosts return to listen-before-transmit mode.

23. Which layer supplies services and allows user interface?
Source and Destination IP address
Host A
A. larger address space b. data types and classes of service c. authentication and encryption
Application Layer

24. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Network address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
0 to 1023
Router(config)# interface FastEthernet 0/1

25. 3 functions of the upper data link sublayer in the OSI model
Network address
Wireless
A. Cat5 UTP b. Cat6 UTP
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

26. What event occurs during the 3-way handshake?
Host mobility
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
TCP initializes the sequence numbers for the sessions.
Identify the device that allows local network computers to communicate w/ devices in other networks.

27. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Is a layer of specific encapsulation.
A. Physical b. Data Link
The address of the router that the host will use to 'get to the other side'.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

28. What command is used to change the default name to 'Costas'?
The packets will be delivered and reassembled at destination.
Router(config)# hostname Costas
Originate data flow.
Binary ANDing

29. What networking devices are recommended to be assigned static IP addresses?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It reduces unnecessary broadcasts.
Console
A. servers b. routers c. network printers

30. What is the primary rope of the physical layer in transmitting data?
Show Interfaces
Create signals that represent the bits in each frame for the media.
They must wait until the first hosts finish transfering the media.
Hub

31. 2 functions of encapsulation
A. minimizing of collisions b. division into broadcast domains
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Signal loss can be experienced.
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

32. Which device is used to create or divide broadcast domains?
Static
80 (HTTP)
Router
Signal loss can be experienced.

33. 3 statements of media acess control
The packets will be delivered and reassembled at destination.
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
A. identifies the communicating applications b. identifies multiple conversations between the hosts

34. 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
SSH
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. netstat -r b. route PRINT
A. the router will discard the packet b. the router will send a time exceeded message to the source host

35. 3 primary functions of the data link layer encapsulation
It reduces unnecessary broadcasts.
A. addressing b. error detection c. frame delimiting
Destination is not contacted before a packet is sent.
Supports error detection.

36. What are 2 protocols for transfering web resources?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. HTTP b. HTTPS
255.255.255.224

37. What method of signal transmission uses radio waves to carry signals?
A. they initiate data exchanges b. they may upload data to servers
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.
Wireless

38. What is an automated service that matches resource names w/ required IP addresses?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Next-Hop Address
Wireless
DNS

39. What statements describe the logical token-passing topology?
The packets will be delivered and reassembled at destination.
A. HTTP b. HTTPS
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Static

40. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. next-hop b. metric/interface c. destination network address
A. purpose b. geographic location c. ownership
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

41. If you have a full-duplex operational network - what can happen?
It does not support encryption.
No collisions will occur on this link.
A backbone cable.
Hosts return to listen-before-transmit mode.

42. What is a drawback of the CSMA/CD access method?
Is used by the server to resolve names.
Collisions can decrease network performance.
A. router b. firewall
A. flow control b. session establishment c. numbering and sequencing

43. 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?
172.16.192.160
They must wait until the first hosts finish transfering the media.
Rollover cable
A. the router will discard the packet b. the router will send a time exceeded message to the source host

44. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
OTDR
Originate data flow.
Transport

45. What is a default gateway address?

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46. When a network service fails - which port is most often used to access a router for management purposes?
A. low overhead b. connectionless
A. goodput b. throughput c. bandwidth
Console
Physical

47. What is the primary function of encapsulating packets into frames?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
To facilitate the entry and exit of data on media.
A backbone cable.
A physical topology.

48. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network
0 to 1023
A. HTTP b. HTTPS

49. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Hosts return to listen-before-transmit mode.
0 to 1023
A physical topology.

50. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
Identify the device that allows local network computers to communicate w/ devices in other networks.
The address of the router that the host will use to 'get to the other side'.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.