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. Why are port numbers included in the TCP header of a segment?
A. DNS b. SMTP c. POP
A. minimizing of collisions b. division into broadcast domains
Collisions can decrease network performance.
To enable a receiving host to forward the data to the appropriate application.

2. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
MAC
Hub
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Ctrl + Shift + 6

3. An admin needs to keep contents private - which access method should he use?
SSH
Originate data flow.
Static
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

4. What type of network cable is used between a terminal and a console port?
A. router b. firewall
The magnetic field around the adjacent pairs of wire.
Rollover cable
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

5. What is the purpose of the TCP/IP Network Application Layer?
IP Protocol
0 to 1023
Network Media Control
Destination is not contacted before a packet is sent.

6. What can be a problem that is reduced by adding end-to-end addressing?
Flash
It reduces unnecessary broadcasts.
Binary ANDing
RJ-45

7. 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
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. larger address space b. data types and classes of service c. authentication and encryption
Network address

8. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
255.255.255.224
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

9. Which combination of keys can be used to interrupt a ping or traceroute process?
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
FTP
Ctrl + Shift + 6
Static

10. 3 functions of the upper data link sublayer in the OSI model
Originate data flow.
To prevent the receiver from being overwhelmed by incoming data.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Destination Network Address

11. What makes fiber preferable to copper for interconnecting buildings?
A. media sharing b. logical topology
Host A
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
SSH

12. What is an automated service that matches resource names w/ required IP addresses?
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. enable mode b. priviledge executive mode
DNS
Network address

13. 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
A physical topology.
It provides interface between applications on either end of the network.
Any device whose backoff timer expires first.

14. What is the primary function of encapsulating packets into frames?
A. next-hop b. metric/interface c. destination network address
A physical topology.
To facilitate the entry and exit of data on media.
The address of the router that the host will use to 'get to the other side'.

15. What is PDU?
Application Layer
DNS
Is a layer of specific encapsulation.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

16. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A. minimizing of collisions b. division into broadcast domains
The address of the router that the host will use to 'get to the other side'.
A. physical layer b. DLL layer

17. 3 primary functions of the data link layer encapsulation
A. copper UTP b. optical fiber
A. replace a switch w/ a router b. subnet the new networks
Network Media Control
A. addressing b. error detection c. frame delimiting

18. What method of signal transmission uses radio waves to carry signals?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
SMB
Wireless
A. MTA b. SMTP

19. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
A backbone cable.
IP is not properly installed
Fiber

20. When is a straight-through cable used in a 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)
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final 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
When connecting a host to a switch.

21. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
MAC
80 (HTTP)
Create signals that represent the bits in each frame for the media.
Physical

22. What determines the method of media access control?
Router(config)# hostname Costas
Create signals that represent the bits in each frame for the media.
A. media sharing b. logical topology
A. identifies the communicating applications b. identifies multiple conversations between the hosts

23. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Binary ANDing
Router(config)# interface FastEthernet 0/1
A. non-deterministic b. less overhead c. collisions exist

24. 3 features that allow TCP to realibly and accurately track the transmission of data
A. Physical b. Data Link
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Rollover cable
A. flow control b. session establishment c. numbering and sequencing

25. What statements describe the logical token-passing topology?
UDP
Network Media Control
A. Physical b. Data Link
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

26. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
Physical
Ctrl + Shift + 6
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

27. What correctly describes a MAC address?
255.255.255.0
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Originate data flow.

28. What layer encapsulates segments into packets?
Network Layer
A. larger address space b. data types and classes of service c. authentication and encryption
The packets will be delivered and reassembled at destination.
It has expanded adressing capabilities.

29. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. application b. services
Rollover cable
The magnetic field around the adjacent pairs of wire.
Destination Network Address

30. 3 features of IPv6
The magnetic field around the adjacent pairs of wire.
A. larger address space b. data types and classes of service c. authentication and encryption
The packets will be delivered and reassembled at destination.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

31. 3 measures of data transfer
Host A
A. servers b. routers c. network printers
The address of the router that the host will use to 'get to the other side'.
A. goodput b. throughput c. bandwidth

32. What are 3 common problems w/ large networks?
Network address
Network Layer
Resolve IPv4 addresses to MAC addresses.
A. perform degradation b. security issues c. host identification

33. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
80 (HTTP)
A. router b. firewall
UTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

34. What 2 type of cables would most commonly be used for new runs?
Network Access
Source and Destination IP address
A. Cat5 UTP b. Cat6 UTP
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

35. 3 factors that should be considered when implementing Layer 2 protocols
SMB
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Is a layer of specific encapsulation.
No collisions will occur on this link.

36. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
A. low overhead b. connectionless
A. replace a switch w/ a router b. subnet the new networks
32 bits

37. What can get you to an outside network?
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 default gateway (router).
Host A
A. larger address space b. data types and classes of service c. authentication and encryption

38. What command is used to change the default name to 'Costas'?
Source and Destination Ports
IP Protocol
Router(config)# hostname Costas
Hosts return to listen-before-transmit mode.

39. 3 statements about routes and their use
A. router b. firewall
Rollover cable
To enable a receiving host to forward the data to the appropriate application.
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

40. What is a protocol that provides connectionless network layer services?
IP is not properly installed
Collisions can decrease network performance.
IP Protocol
Transport

41. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. DB 60 b. Winchester 15-pin c. smart serial

42. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Host mobility
Rollover cable

43. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
255.255.255.0
Show Interfaces
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

44. Which portion of the network layer address does a router use to forward packets?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
To prevent the receiver from being overwhelmed by incoming data.
Network portion
It uses support from the lower layers to distinguish between connections to the service.

45. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
It does not support encryption.
SMB
2046
Network portion

46. What are 2 forms of application layer software?
A. DB 60 b. Winchester 15-pin c. smart serial
DNS
A. application b. services
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

47. Which IP packet field will prevent endless loops?
Create signals that represent the bits in each frame for the media.
Time-to-live (TTL)
Console
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

48. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
2046
A. netstat -r b. route PRINT
Network

49. Which characteristics describe fiber optic cable?
2046
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. not affected by EMI of RFI b. most expensive type of LAN cabling
A. router b. firewall

50. What is the purpose of the preamble in an ethernet frame?
A. it has centralized administration b. security is easier to enforce
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Is a layer of specific encapsulation.
To prevent the receiver from being overwhelmed by incoming data.