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. Which combination of keys can be used to interrupt a ping or traceroute process?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Ctrl + Shift + 6
Hosts return to listen-before-transmit mode.
SMB

2. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
Is a layer of specific encapsulation.
Host mobility
UDP

3. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
2046
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
When connecting a host to a switch.
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

4. What is a disadvantage of Telnet?
A. enable mode b. priviledge executive mode
32 bits
It does not support encryption.
The MAC protocol can be very simple.

5. 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
Signal loss can be experienced.
IP is not properly installed
Network Access

6. What information is added during encapsulation at OSI Layer 3?
A. perform degradation b. security issues c. host identification
A. low overhead b. connectionless
The address of the router that the host will use to 'get to the other side'.
Source and Destination IP address

7. 2 functions of encapsulation
Network address
A. perform degradation b. security issues c. host identification
A. application b. services
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

8. Group of hosts that have identical bit patterns in the high order bits of their addresses
DNS
Network
Destination Network Address
A. purpose b. geographic location c. ownership

9. What are 2 common characteristics associated w/ dynamic routing protocols?
A. MTA b. SMTP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Logical Link Control sublayer
Signal loss can be experienced.

10. What are 3 common problems w/ large networks?
No collisions will occur on this link.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
172.16.192.160
A. perform degradation b. security issues c. host identification

11. Which portion of the network layer address does a router use to forward packets?
Is used by the server to resolve names.
A. router b. firewall
Network portion
A. copper UTP b. optical fiber

12. When do changes take effect in a Cisco router?
A. enable mode b. priviledge executive mode
Static
When connecting a host to a switch.
As the commands are entered.

13. What is the purpose of the preamble in an ethernet frame?
When connecting a host to a switch.
The magnetic field around the adjacent pairs of wire.
A. flow control b. session establishment c. numbering and sequencing
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

14. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A random delay helps prevent the stations from experiencing another collision during transmission.
OTDR
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

15. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It reduces unnecessary broadcasts.
Twisting of the cables
Network
Supports error detection.

16. 3 protocols that operate in the application layer
To prevent the receiver from being overwhelmed by incoming data.
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
It uses support from the lower layers to distinguish between connections to the service.
A. DNS b. SMTP c. POP

17. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. physical layer b. DLL layer
Transport
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
80 (HTTP)

18. When a network service fails - which port is most often used to access a router for management purposes?
Source Port
A. router b. firewall
Host A
Console

19. What is the purpose of a default gateway?
Network address
IP is not properly installed
Network Access
Identify the device that allows local network computers to communicate w/ devices in other networks.

20. How many bits make up an IPv4 address?
32 bits
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Ctrl + Shift + 6
A. Cat5 UTP b. Cat6 UTP

21. When destination network is not in the routing table - What are 2 actions the router might take?
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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
0 to 1023
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

22. 2 features that make switches preferable to hubs
A. perform degradation b. security issues c. host identification
A. HTTP b. HTTPS
A. minimizing of collisions b. division into broadcast domains
UDP

23. Important characteristic of UDP
Minimal delays in data delivery.
To facilitate the entry and exit of data on media.
A backbone cable.
It provides for the exchange of data over a common local media.

24. 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?
TCP initializes the sequence numbers for the sessions.
A. next-hop b. metric/interface c. destination network address
MAC
172.16.192.160

25. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It uses lasers as the light source.
Static
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Hosts return to listen-before-transmit mode.

26. What layer encapsulates segments into packets?
Network Layer
A physical topology.
A. application b. services
TCP initializes the sequence numbers for the sessions.

27. 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?
Network Layer Packet
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. show startup-config b. show running-config
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

28. Which type of cable is most often associated w/ fiber-optic cable?
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 physical topology.
A backbone cable.
Network Layer Packet

29. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. application b. services
255.255.255.0
Destination Network Address
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

30. 2 characteristics of peer-2-peer
A. non-deterministic b. less overhead c. collisions exist
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
2046
A. decentralized resources b. resource sharing w/o a dedicated server

31. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Router(config)# interface FastEthernet 0/1
Console interface

32. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
To enable a receiving host to forward the data to the appropriate application.
Host A
80 (HTTP)

33. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
255.255.255.0
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

34. In a connectionless system - What is correct?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Destination is not contacted before a packet is sent.
SMB

35. 3 facts about the network portion of an IPv4 address
172.16.192.160
A. purpose b. geographic location c. ownership
A. Cat5 UTP b. Cat6 UTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

36. 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
They must wait until the first hosts finish transfering the media.
Twisting of the cables
A. router b. firewall
A. the router will discard the packet b. the router will send a time exceeded message to the source host

37. What are the advantages of using a client-server model?
Static
A. it has centralized administration b. security is easier to enforce
A. they initiate data exchanges b. they may upload data to servers
UTP

38. What do end devices do?
A. copper UTP b. optical fiber
32 bits
Originate data flow.
8

39. 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?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Originate data flow.
Minimal delays in data delivery.
They must wait until the first hosts finish transfering the media.

40. statements of IP adressing
Console interface
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. enable mode b. priviledge executive mode
A. the router will discard the packet b. the router will send a time exceeded message to the source host

41. 3 characteristics of valid Ethernet Layer 2 addresses
Router(config)# interface FastEthernet 0/1
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
When connecting a host to a switch.
Network Layer Packet

42. What describes the purpose of default route?
Binary ANDing
MAC
No collisions will occur on this link.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

43. What method of signal transmission uses radio waves to carry signals?
Wireless
A. Physical b. Data Link
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
Source Port

44. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# hostname Costas
Supports error detection.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

45. What type of routing uses information that is manually entered into the routing table?
Static
The MAC protocol can be very simple.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Destination is not contacted before a packet is sent.

46. 3 statements about the role of routers in the network
Flash
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A physical topology.
255.255.255.224

47. What kind of problems are caused by excessive broadcast traffic on network segments?
SSH
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Time-to-live (TTL)
Signal loss can be experienced.

48. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Router(config)# hostname Costas
Destination Network Address
A. purpose b. geographic location c. ownership

49. What application layer protocol is used to support file transfers between client and server?
Application Layer
A random delay helps prevent the stations from experiencing another collision during transmission.
FTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

50. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
32 bits
Network
Flash