Test your basic knowledge |

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 role of the OSI Application Layer?
A. addressing b. error detection c. frame delimiting
It provides interface between applications on either end of the network.
255.255.255.224
Network Access

2. What is the purpose of resource records in DNS?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Is used by the server to resolve names.
A. DNS b. SMTP c. POP
Next-Hop Address

3. What do end devices do?
Originate data flow.
A. show startup-config b. show running-config
A. DNS b. SMTP c. POP
Switch

4. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
80 (HTTP)
A. larger address space b. data types and classes of service c. authentication and encryption
MAC

5. Why are port numbers included in the TCP header of a segment?
Network Access
To enable a receiving host to forward the data to the appropriate application.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Identify the device that allows local network computers to communicate w/ devices in other networks.

6. What is the primary reason for developing IPv6?
OTDR
It has expanded adressing capabilities.
Console interface
They must wait until the first hosts finish transfering the media.

7. When a network service fails - which port is most often used to access a router for management purposes?
The packets will be delivered and reassembled at destination.
Network Access
Console
A. not affected by EMI of RFI b. most expensive type of LAN cabling

8. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
Hosts return to listen-before-transmit mode.
RJ-45
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

9. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
Physical
A. performance degradation b. security issues c. host identification
Rollover cable

10. When destination network is not in the routing table - What are 2 actions the router might take?
A. replace a switch w/ a router b. subnet the new networks
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

11. What describes the purpose of default route?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. copper UTP b. optical fiber
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

12. What are 2 protocols for transfering web resources?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. HTTP b. HTTPS
A. performance degradation b. security issues c. host identification
A. addressing b. error detection c. frame delimiting

13. 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
A. low overhead b. connectionless
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

14. What statements describe the logical token-passing topology?
A. enable mode b. priviledge executive mode
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. addressing b. error detection c. frame delimiting
2046

15. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Router
A. enable mode b. priviledge executive mode
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

16. What are the advantages of using a client-server model?
Time-to-live (TTL)
A. netstat -r b. route PRINT
A. it has centralized administration b. security is easier to enforce
The MAC protocol can be very simple.

17. 3 common problems w/ a large network
A. next-hop b. metric/interface c. destination network address
DNS
A. performance degradation b. security issues c. host identification
Minimal delays in data delivery.

18. Default Gateway is incorrect on the host - What is the impact on the communications?
Transport
A. MTA b. SMTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A default gateway (router).

19. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Next-Hop Address
Physical
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
172.16.192.160

20. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Fiber
Any device whose backoff timer expires first.
Switch
172.16.192.160

21. Group of hosts that have identical bit patterns in the high order bits of their addresses
Minimal delays in data delivery.
Network
Is a layer of specific encapsulation.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

22. Which IP packet field will prevent endless loops?
Rollover cable
A. goodput b. throughput c. bandwidth
A. Physical b. Data Link
Time-to-live (TTL)

23. 2 characteristics of clients in data networks
Console interface
A. it has centralized administration b. security is easier to enforce
A. they initiate data exchanges b. they may upload data to servers
80 (HTTP)

24. When do changes take effect in a Cisco router?
Is used by the server to resolve names.
As the commands are entered.
UDP
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

25. If there is a graphic representation of a company network wiring and equipment - What is this called?
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
A physical topology.
Logical Link Control sublayer

26. What can be a problem that is reduced by adding end-to-end addressing?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
It reduces unnecessary broadcasts.
Wireless
A. addressing b. error detection c. frame delimiting

27. What is a component of a routing table entry?
FTP
Next-Hop Address
Fiber
IP Protocol

28. 3 features that allow TCP to realibly and accurately track the transmission of data
Twisting of the cables
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Network address
A. flow control b. session establishment c. numbering and sequencing

29. 3 statements of media acess control
Collisions can decrease network performance.
Minimal delays in data delivery.
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. minimizing of collisions b. division into broadcast domains

30. What is the purpose of the preamble in an ethernet frame?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. DB 60 b. Winchester 15-pin c. smart serial
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
0 to 1023

31. What is a characteristic of a single-mode fiber-optic cable?
A. Cat5 UTP b. Cat6 UTP
Create signals that represent the bits in each frame for the media.
UDP
It uses lasers as the light source.

32. 3 facts about the network portion of an IPv4 address
To prevent the receiver from being overwhelmed by incoming data.
Network Access
172.16.192.160
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

33. Statements that describe LAN
Is used by the server to resolve names.
UTP
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
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

34. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
To enable a receiving host to forward the data to the appropriate application.
Router(config)# hostname Costas

35. What is the primary purpose of ARP?
Fiber
Resolve IPv4 addresses to MAC addresses.
Network Media Control
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

36. What correctly describes a MAC address?
It reduces unnecessary broadcasts.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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
Any device whose backoff timer expires first.

37. What 2 type of cables would most commonly be used for new runs?
OTDR
A. Cat5 UTP b. Cat6 UTP
A. servers b. routers c. network printers
Hosts return to listen-before-transmit mode.

38. What is the role of MTA in handling email?
It has expanded adressing capabilities.
A. it has centralized administration b. security is easier to enforce
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

39. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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

40. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. Cat5 UTP b. Cat6 UTP
A. application b. services
IP is not properly installed

41. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
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
Router(config)# interface FastEthernet 0/1
A. Cat5 UTP b. Cat6 UTP
Any device whose backoff timer expires first.

42. At which layers of the OSI model does ethernet operate?
IP is not properly installed
A. non-deterministic b. less overhead c. collisions exist
0 to 1023
A. physical layer b. DLL layer

43. What is a benefit of a WAN?
Source and Destination IP address
The packets will be delivered and reassembled at destination.
It reduces unnecessary broadcasts.
Host mobility

44. What determines the method of media access control?
UDP
A. media sharing b. logical topology
Network
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

45. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
The magnetic field around the adjacent pairs of wire.
A. application b. services
2046
80 (HTTP)

46. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
172.16.192.160
OTDR
A physical topology.

47. What event occurs during the 3-way handshake?
Binary ANDing
A. media sharing b. logical topology
It reduces unnecessary broadcasts.
TCP initializes the sequence numbers for the sessions.

48. Why is flow control used for TCP data transfer?
It reduces unnecessary broadcasts.
Create signals that represent the bits in each frame for the media.
A. replace a switch w/ a router b. subnet the new networks
To prevent the receiver from being overwhelmed by incoming data.

49. What is a protocol that provides connectionless network layer services?
A. Physical b. Data Link
Any device whose backoff timer expires first.
A random delay helps prevent the stations from experiencing another collision during transmission.
IP Protocol

50. Where is the IOS file stored at?
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
Flash
Minimal delays in data delivery.