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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 layer supplies services and allows user interface?
Application Layer
Signal loss can be experienced.
Binary ANDing
SSH

2. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
8
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Physical
Resolve IPv4 addresses to MAC addresses.

3. 3 statements about routes and their use
A. it has centralized administration b. security is easier to enforce
Host A
80 (HTTP)
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. If you have a full-duplex operational network - what can happen?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Router
No collisions will occur on this link.
DNS

5. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
A. performance degradation b. security issues c. host identification
The physical address is added.
A. Cat5 UTP b. Cat6 UTP

6. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Flash
Destination Network Address
Host A

7. 3 protocols that operate in the application layer
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. physical layer b. DLL layer
A. DNS b. SMTP c. POP
To prevent the receiver from being overwhelmed by incoming data.

8. What are 3 pieces of info about a route contained in a routing table?
The magnetic field around the adjacent pairs of wire.
Create signals that represent the bits in each frame for the media.
A. next-hop b. metric/interface c. destination network address
It does not support encryption.

9. If there is a graphic representation of a company network wiring and equipment - What is this called?
Console interface
A. application b. services
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 physical topology.

10. What do the intermediary devices in the network do?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. non-deterministic b. less overhead c. collisions exist
Network

11. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Twisting of the cables
The address of the router that the host will use to 'get to the other side'.
Hosts return to listen-before-transmit mode.
Physical

12. What are 2 features of User Diagram Protocol (UDP)?
The physical address is added.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. low overhead b. connectionless
SSH

13. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
The MAC protocol can be very simple.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
MAC
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

14. What is an effect of improperly applying a network cable connector?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. purpose b. geographic location c. ownership
Hub
Signal loss can be experienced.

15. What does the IEEE 802.2 standard represent in Ethernet technologies?
Show Interfaces
32 bits
Logical Link Control sublayer
It uses support from the lower layers to distinguish between connections to the service.

16. What is the purpose of the TCP/IP Network Application Layer?
The address of the router that the host will use to 'get to the other side'.
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Network Media Control

17. What do end devices do?
Originate data flow.
32 bits
Rollover cable
UDP

18. What are key considering factors when grouping hosts into common networks?
SMB
The physical address is added.
A. purpose b. geographic location c. ownership
Identify the device that allows local network computers to communicate w/ devices in other networks.

19. 3 functions of the upper data link sublayer in the OSI model
Next-Hop Address
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A backbone cable.
As the commands are entered.

20. What is dinamically selected by the source host when forwarding data?
Router
Network Layer
Window Size
Source Port

21. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
A. DNS b. SMTP c. POP
When connecting a host to a switch.
To enable a receiving host to forward the data to the appropriate application.

22. What info is found in the TCP and UDP header info?
Source and Destination Ports
Is a layer of specific encapsulation.
Host mobility
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

23. What are 3 common problems w/ large networks?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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
A. perform degradation b. security issues c. host identification

24. What is a drawback of the CSMA/CD access method?
2046
Collisions can decrease network performance.
Is used by the server to resolve names.
MAC

25. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Time-to-live (TTL)
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Fiber
255.255.255.224

26. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Time-to-live (TTL)
Is used by the server to resolve names.
A. Physical b. Data Link
A. DB 60 b. Winchester 15-pin c. smart serial

27. What is a component of a routing table entry?
Next-Hop Address
A random delay helps prevent the stations from experiencing another collision during transmission.
The magnetic field around the adjacent pairs of wire.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

28. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. netstat -r b. route PRINT
A physical topology.
Console

29. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. low overhead b. connectionless
Source and Destination IP address
Router(config)# hostname Costas

30. Which device is used to create or divide broadcast domains?
A. perform degradation b. security issues c. host identification
Router
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
FTP

31. When is a straight-through cable used in a network?
A random delay helps prevent the stations from experiencing another collision during transmission.
When connecting a host to a switch.
Time-to-live (TTL)
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

32. What describes the purpose of default route?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
255.255.255.224
OTDR

33. What command is used to change the default name to 'Costas'?
A. physical layer b. DLL layer
It uses lasers as the light source.
Router(config)# hostname Costas
Ctrl + Shift + 6

34. What is the primary rope of the physical layer in transmitting data?
255.255.255.224
Create signals that represent the bits in each frame for the media.
IP is not properly installed
Switch

35. 2 characteristics of peer-2-peer
Logical Link Control sublayer
A. decentralized resources b. resource sharing w/o a dedicated server
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
Source and Destination IP address

36. Group of hosts that have identical bit patterns in the high order bits of their addresses
Transport
TCP initializes the sequence numbers for the sessions.
Network
A. show startup-config b. show running-config

37. If you have a small network w/ 3 computers...
A. application b. services
It provides for the exchange of data over a common local media.
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. 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

38. What is the primary reason for developing IPv6?
To facilitate the entry and exit of data on media.
Source and Destination Ports
A. non-deterministic b. less overhead c. collisions exist
It has expanded adressing capabilities.

39. What is PDU?
It does not support encryption.
Is a layer of specific encapsulation.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Access

40. What event occurs during the 3-way handshake?
255.255.255.0
Fiber
Rollover cable
TCP initializes the sequence numbers for the sessions.

41. 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?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. show startup-config b. show running-config
To prevent the receiver from being overwhelmed by incoming data.
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

42. What is a disadvantage of Telnet?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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
It does not support encryption.

43. When a network service fails - which port is most often used to access a router for management purposes?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Console
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

44. Which combination of keys can be used to interrupt a ping or traceroute process?
Transport
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
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
Ctrl + Shift + 6

45. What are 2 email components used to forward mail between servers?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. goodput b. throughput c. bandwidth
A. MTA b. SMTP
A default gateway (router).

46. What is a characteristic of a logical point-to-point topology?
It provides for the exchange of data over a common local media.
The MAC protocol can be very simple.
Twisting of the cables
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

47. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Rollover cable
UDP

48. To make a console connection from a comp to a Cisco router - what cable should be used?
Fiber
Rollover cable
SSH
A. minimizing of collisions b. division into broadcast domains

49. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. it has centralized administration b. security is easier to enforce
Transport
A. enable mode b. priviledge executive mode
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

50. What is a protocol that provides connectionless network layer services?
The physical address is added.
32 bits
IP Protocol
Twisting of the cables