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. 3 terms that define the forms of help available within the Cisco IOS
A. servers b. routers c. network printers
A. hot keys b. context-sensitive c. command syntax check
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. they initiate data exchanges b. they may upload data to servers

2. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
It uses support from the lower layers to distinguish between connections to the service.
To prevent the receiver from being overwhelmed by incoming data.
To enable a receiving host to forward the data to the appropriate application.

3. Important characteristic of UDP
Is a layer of specific encapsulation.
Minimal delays in data delivery.
A random delay helps prevent the stations from experiencing another collision during transmission.
Host A

4. 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. performance degradation b. security issues c. host identification
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

5. What can you identify when you examine the Network Layer header?
A. perform degradation b. security issues c. host identification
The destination host address.
Host mobility
Hosts return to listen-before-transmit mode.

6. What is a component of a routing table entry?
Next-Hop Address
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Binary ANDing
A. addressing b. error detection c. frame delimiting

7. What do you need to use for an initial configuration on a Cisco router?
Console interface
Show Interfaces
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Supports error detection.

8. What info is found in the TCP and UDP header info?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Source and Destination Ports
To enable a receiving host to forward the data to the appropriate application.
A. MTA b. SMTP

9. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. they initiate data exchanges b. they may upload data to servers
Binary ANDing
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

10. What is the primary function of encapsulating packets into frames?
MAC
A. they initiate data exchanges b. they may upload data to servers
To facilitate the entry and exit of data on media.
A. MTA b. SMTP

11. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To enable a receiving host to forward the data to the appropriate application.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

12. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. copper UTP b. optical fiber
UTP
32 bits
Window Size

13. 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
It does not support encryption.
A. media sharing b. logical topology
0 to 1023

14. In a connectionless system - What is correct?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
SSH
Flash
Destination is not contacted before a packet is sent.

15. 3 factors that should be considered when implementing Layer 2 protocols
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It provides interface between applications on either end of the network.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

16. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
The destination host address.
Router
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

17. What are 2 common characteristics associated w/ dynamic routing protocols?
255.255.255.0
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
IP Protocol
RJ-45

18. Default Gateway is incorrect on the host - What is the impact on the communications?
To enable a receiving host to forward the data to the appropriate application.
8
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

19. What layer encapsulates segments into packets?
A. servers b. routers c. network printers
Hosts return to listen-before-transmit mode.
A physical topology.
Network Layer

20. If there is a graphic representation of a company network wiring and equipment - What is this called?
Source and Destination IP address
SMB
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A physical topology.

21. Why is flow control used for TCP data transfer?
When connecting a host to a switch.
A. Physical b. Data Link
2046
To prevent the receiver from being overwhelmed by incoming data.

22. What type of routing uses information that is manually entered into the routing table?
Host mobility
Static
Router(config)# interface FastEthernet 0/1
No collisions will occur on this link.

23. Which characteristics describe fiber optic cable?
A. goodput b. throughput c. bandwidth
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
Minimal delays in data delivery.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

24. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Identify processes or services that are communicating with end devices.
Signal loss can be experienced.
A. DB 60 b. Winchester 15-pin c. smart serial
It uses support from the lower layers to distinguish between connections to the service.

25. What 2 type of cables would most commonly be used for new runs?
A. copper UTP b. optical fiber
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. Cat5 UTP b. Cat6 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

26. Intermediary devices used to implement security between networks
A. router b. firewall
Router
Supports error detection.
IP Protocol

27. How does the application layer on a server process multiple client requests for services?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
As the commands are entered.
A. replace a switch w/ a router b. subnet the new networks
It uses support from the lower layers to distinguish between connections to the service.

28. What is a drawback of the CSMA/CD access method?
A. enable mode b. priviledge executive mode
Rollover cable
A default gateway (router).
Collisions can decrease network performance.

29. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Network Media Control
Hub
Binary ANDing
A. performance degradation b. security issues c. host identification

30. What is a protocol that provides connectionless network layer services?
To enable a receiving host to forward the data to the appropriate application.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
IP Protocol
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

31. In business LANs - which connector is used w/ twisted-pair networking cable?
A. show startup-config b. show running-config
Router(config)# hostname Costas
RJ-45
0 to 1023

32. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
8
SSH
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Show Interfaces

33. To make a console connection from a comp to a Cisco router - what cable should be used?
A. Cat5 UTP b. Cat6 UTP
Rollover cable
2046
A. the router will discard the packet b. the router will send a time exceeded message to the source host

34. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
To enable a receiving host to forward the data to the appropriate application.
UTP
Destination Network Address
Network Layer Packet

35. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
Network portion
A. replace a switch w/ a router b. subnet the new networks
8

36. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Any device whose backoff timer expires first.
A. DB 60 b. Winchester 15-pin c. smart serial
As the commands are entered.
255.255.255.0

37. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
The physical address is added.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Network address
A. Cat5 UTP b. Cat6 UTP

38. What is a characteristic of a logical point-to-point topology?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Switch
The MAC protocol can be very simple.

39. What is the primary purpose of Layer 4?
IP is not properly installed
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Identify processes or services that are communicating with end devices.
DNS

40. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
Switch
Is a layer of specific encapsulation.
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

41. 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?
2046
UDP
Console
Network Layer Packet

42. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Resolve IPv4 addresses to MAC addresses.
It reduces unnecessary broadcasts.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

43. 3 features that allow TCP to realibly and accurately track the transmission of data
Static
A. flow control b. session establishment c. numbering and sequencing
Network portion
The packets will be delivered and reassembled at destination.

44. statements of IP adressing
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. flow control b. session establishment c. numbering and sequencing
Router(config)# interface FastEthernet 0/1
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

45. 3 functions of the upper data link sublayer in the OSI model
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
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
Fiber

46. What command can be used to determine if the router has experienced any input or output errors?
A. DB 60 b. Winchester 15-pin c. smart serial
Show Interfaces
Any device whose backoff timer expires first.
A. purpose b. geographic location c. ownership

47. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Application Layer

48. 3 primary functions of the data link layer encapsulation
The MAC protocol can be very simple.
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
Switch
A. addressing b. error detection c. frame delimiting

49. What is dinamically selected by the source host when forwarding data?
FTP
Binary ANDing
A. Cat5 UTP b. Cat6 UTP
Source Port

50. What networking devices are recommended to be assigned static IP addresses?
A. MTA b. SMTP
It uses lasers as the light source.
A. servers b. routers c. network printers
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