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
Physical
A. hot keys b. context-sensitive c. command syntax check
Network Layer
Host A

2. What command can be used to determine if the router has experienced any input or output errors?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Destination Network Address
Show Interfaces

3. 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?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. replace a switch w/ a router b. subnet the new networks
8
Switch

4. Why are port numbers included in the TCP header of a segment?
SMB
Console
To enable a receiving host to forward the data to the appropriate application.
Any device whose backoff timer expires first.

5. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A backbone cable.
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
Hosts return to listen-before-transmit mode.

6. What is the purpose of a default gateway?
A. goodput b. throughput c. bandwidth
IP Protocol
Identify the device that allows local network computers to communicate w/ devices in other networks.
Is used by the server to resolve names.

7. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Destination is not contacted before a packet is sent.
A. router b. firewall
Host A

8. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Network address
A. HTTP b. HTTPS
255.255.255.0
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

9. What are 3 pieces of info about a route contained in a routing table?
A. enable mode b. priviledge executive mode
A. HTTP b. HTTPS
Source and Destination Ports
A. next-hop b. metric/interface c. destination network address

10. statements of IP adressing
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
Network address
Originate data flow.
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. An admin needs to keep contents private - which access method should he use?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
255.255.255.0
SSH
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

12. 3 statements of media acess control
Collisions can decrease network performance.
The magnetic field around the adjacent pairs of wire.
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. copper UTP b. optical fiber

13. What is the purpose of resource records in DNS?
Rollover cable
A. replace a switch w/ a router b. subnet the new networks
A. performance degradation b. security issues c. host identification
Is used by the server to resolve names.

14. What is dinamically selected by the source host when forwarding data?
Source Port
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. DNS b. SMTP c. POP
Window Size

15. 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
Rollover cable
Resolve IPv4 addresses to MAC addresses.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A physical topology.

16. 3 statements about routes and their use
Network Layer
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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

17. What info is found in the TCP and UDP header info?
SMB
Source Port
Host A
Source and Destination Ports

18. 3 functions of the upper data link sublayer in the OSI model
Network Layer
Show Interfaces
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
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

19. Which layer supplies services and allows user interface?
Flash
As the commands are entered.
Application Layer
A. they initiate data exchanges b. they may upload data to servers

20. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
8
Show Interfaces
0 to 1023
Physical

21. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The packets will be delivered and reassembled at destination.
Source Port
Network Media Control

22. What do the intermediary devices in the network do?
Create signals that represent the bits in each frame for the media.
Network Layer Packet
A. Cat5 UTP b. Cat6 UTP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

23. If you have a full-duplex operational network - what can happen?
The magnetic field around the adjacent pairs of wire.
Supports error detection.
UTP
No collisions will occur on this link.

24. What can you identify when you examine the Network Layer header?
A. non-deterministic b. less overhead c. collisions exist
The destination host address.
A. minimizing of collisions b. division into broadcast domains
A. it has centralized administration b. security is easier to enforce

25. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Collisions can decrease network performance.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. application b. services
Network

26. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
Hub
A. Physical b. Data Link
The packets will be delivered and reassembled at destination.

27. When do changes take effect in a Cisco router?
80 (HTTP)
As the commands are entered.
A. Cat5 UTP b. Cat6 UTP
A. addressing b. error detection c. frame delimiting

28. Which IP packet field will prevent endless loops?
Console interface
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
The physical address is added.
Time-to-live (TTL)

29. What is PDU?
Is a layer of specific encapsulation.
Static
Minimal delays in data delivery.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

30. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Resolve IPv4 addresses to MAC addresses.
Network address
Next-Hop Address
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

31. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
Hub
Wireless
8

32. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
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
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. HTTP b. HTTPS

33. 2 characteristics of clients in data networks
A. DB 60 b. Winchester 15-pin c. smart serial
UTP
A. MTA b. SMTP
A. they initiate data exchanges b. they may upload data to servers

34. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
Resolve IPv4 addresses to MAC addresses.
They must wait until the first hosts finish transfering the media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Flash

35. What device can check for faults - integrity and performance of media?
It uses lasers as the light source.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Time-to-live (TTL)
OTDR

36. Which device is used to create or divide broadcast domains?
Identify processes or services that are communicating with end devices.
Router
Supports error detection.
A. purpose b. geographic location c. ownership

37. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. perform degradation b. security issues c. host identification
Network Access
A physical topology.
Is used by the server to resolve names.

38. Default Gateway is incorrect on the host - What is the impact on the communications?
A. DB 60 b. Winchester 15-pin c. smart serial
A. servers b. routers c. network printers
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

39. What determines the method of media access control?
A. media sharing b. logical topology
Create signals that represent the bits in each frame for the media.
Hosts return to listen-before-transmit mode.
Resolve IPv4 addresses to MAC addresses.

40. What is the purpose of the preamble in an ethernet frame?
255.255.255.0
SSH
MAC
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

41. What is an effect of improperly applying a network cable connector?
A. HTTP b. HTTPS
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
Signal loss can be experienced.
A. servers b. routers c. network printers

42. What correctly describes a MAC address?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Next-Hop Address
A. they initiate data exchanges b. they may upload data to servers
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

43. 3 protocols that operate in the application layer
Router(config)# interface FastEthernet 0/1
A. flow control b. session establishment c. numbering and sequencing
A. DNS b. SMTP c. POP
The physical address is added.

44. What do end devices do?
Identify processes or services that are communicating with end devices.
The physical address is added.
Originate data flow.
FTP

45. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Rollover cable
80 (HTTP)
A. netstat -r b. route PRINT
Destination Network Address

46. What is a component of a routing table entry?
Next-Hop Address
The address of the router that the host will use to 'get to the other side'.
It does not support encryption.
Network

47. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
No collisions will occur on this link.
Window Size
To prevent the receiver from being overwhelmed by incoming data.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

48. What application layer protocol is used to support file transfers between client and server?
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
The magnetic field around the adjacent pairs of wire.
Originate data flow.
FTP

49. 2 features that make switches preferable to hubs
A. router b. firewall
255.255.255.224
Is used by the server to resolve names.
A. minimizing of collisions b. division into broadcast domains

50. What layer encapsulates segments into packets?
Destination Network Address
Network Layer
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
255.255.255.0