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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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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. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
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
Hosts return to listen-before-transmit mode.
A. perform degradation b. security issues c. host identification
A default gateway (router).

2. What are 2 email components used to forward mail between servers?
It uses lasers as the light source.
A. MTA b. SMTP
Host mobility
A. not affected by EMI of RFI b. most expensive type of LAN cabling

3. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. enable mode b. priviledge executive mode
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

4. What is a characteristic of a single-mode fiber-optic cable?
Ctrl + Shift + 6
It does not support encryption.
Router(config)# hostname Costas
It uses lasers as the light source.

5. What do the intermediary devices in the network do?
Router(config)# hostname Costas
A. copper UTP b. optical fiber
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

6. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
IP Protocol
Signal loss can be experienced.
A. performance degradation b. security issues c. host identification
Router(config)# interface FastEthernet 0/1

7. 3 terms that define the forms of help available within the Cisco IOS
Fiber
The address of the router that the host will use to 'get to the other side'.
Network Layer Packet
A. hot keys b. context-sensitive c. command syntax check

8. What can be a problem that is reduced by adding end-to-end addressing?
OTDR
It reduces unnecessary broadcasts.
Network
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

9. What are 2 commands used to view a host routing table?
Source Port
A. netstat -r b. route PRINT
FTP
A backbone cable.

10. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
It uses support from the lower layers to distinguish between connections to the service.
Network Media Control

11. What is a component of a routing table entry?
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
Next-Hop Address
Physical
Is used by the server to resolve names.

12. What is an effect of improperly applying a network cable connector?
Identify processes or services that are communicating with end devices.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Signal loss can be experienced.
It reduces unnecessary broadcasts.

13. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Network portion
Wireless
0 to 1023
A. replace a switch w/ a router b. subnet the new networks

14. 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
To prevent the receiver from being overwhelmed by incoming data.
255.255.255.0
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. physical layer b. DLL layer

15. Important characteristic of UDP
Minimal delays in data delivery.
A. router b. firewall
It uses support from the lower layers to distinguish between connections to the service.
A. Physical b. Data Link

16. What is a protocol that provides connectionless network layer services?
IP is not properly installed
It reduces unnecessary broadcasts.
IP Protocol
Next-Hop Address

17. 3 statements about routes and their use
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
A random delay helps prevent the stations from experiencing another collision during transmission.
Identify processes or services that are communicating with end devices.
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

18. What application layer protocol is used to support file transfers between client and server?
FTP
A. application b. services
The physical address is added.
A. purpose b. geographic location c. ownership

19. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
UDP
A. Physical b. Data Link
172.16.192.160

20. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
UDP
It has expanded adressing capabilities.
Create signals that represent the bits in each frame for the media.

21. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. goodput b. throughput c. bandwidth
255.255.255.0
Binary ANDing
A. identifies the communicating applications b. identifies multiple conversations between the hosts

22. Why is flow control used for TCP data transfer?
Network Media Control
To prevent the receiver from being overwhelmed by incoming data.
Logical Link Control sublayer
IP is not properly installed

23. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Ctrl + Shift + 6
A. performance degradation b. security issues c. host identification
It provides interface between applications on either end of the network.

24. 3 functions of the upper data link sublayer in the OSI model
The magnetic field around the adjacent pairs of wire.
A. next-hop b. metric/interface c. destination network address
Network portion
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

25. 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
UDP
Minimal delays in data delivery.
It does not support encryption.

26. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Rollover cable
Network Media Control
A random delay helps prevent the stations from experiencing another collision during transmission.

27. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
A. DB 60 b. Winchester 15-pin c. smart serial
Switch
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

28. 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?
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
As the commands are entered.
Host A
Hub

29. What do you need to use for an initial configuration on a Cisco router?
Console interface
0 to 1023
A. Physical b. Data Link
Network

30. statements of IP adressing
Network Layer
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
IP Protocol

31. What are 2 features of User Diagram Protocol (UDP)?
Create signals that represent the bits in each frame for the media.
UDP
Physical
A. low overhead b. connectionless

32. When is a straight-through cable used in a network?
A. hot keys b. context-sensitive c. command syntax check
255.255.255.0
When connecting a host to a switch.
A. router b. firewall

33. 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?
UDP
A. replace a switch w/ a router b. subnet the new networks
2046
A. not affected by EMI of RFI b. most expensive type of LAN cabling

34. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Console
Transport
DNS
SMB

35. What event occurs during the 3-way handshake?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
TCP initializes the sequence numbers for the sessions.
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
Next-Hop Address

36. What is a disadvantage of Telnet?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It does not support encryption.
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

37. 2 characteristics of peer-2-peer
Any device whose backoff timer expires first.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Identify processes or services that are communicating with end devices.
A. decentralized resources b. resource sharing w/o a dedicated server

38. Which combination of keys can be used to interrupt a ping or traceroute process?
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 physical topology.
To prevent the receiver from being overwhelmed by incoming data.
Ctrl + Shift + 6

39. Where is the IOS file stored at?
Hosts return to listen-before-transmit mode.
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
Flash
A physical topology.

40. 3 primary functions of the data link layer encapsulation
A. servers b. routers c. network printers
The address of the router that the host will use to 'get to the other side'.
Destination is not contacted before a packet is sent.
A. addressing b. error detection c. frame delimiting

41. What are 2 protocols for transfering web resources?
172.16.192.160
A physical topology.
A. HTTP b. HTTPS
A random delay helps prevent the stations from experiencing another collision during transmission.

42. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Window Size
Time-to-live (TTL)
A. replace a switch w/ a router b. subnet the new networks

43. What is dinamically selected by the source host when forwarding data?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Source Port
OTDR
Host mobility

44. What correctly describes a MAC address?
As the commands are entered.
Router(config)# hostname Costas
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
No collisions will occur on this link.

45. 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. purpose b. geographic location c. ownership
A. show startup-config b. show running-config
It has expanded adressing capabilities.
0 to 1023

46. What layer encapsulates segments into packets?
Resolve IPv4 addresses to MAC addresses.
IP Protocol
80 (HTTP)
Network Layer

47. What is PDU?
A random delay helps prevent the stations from experiencing another collision during transmission.
Is a layer of specific encapsulation.
The MAC protocol can be very simple.
It uses lasers as the light source.

48. What is the primary function of encapsulating packets into frames?
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. Cat5 UTP b. Cat6 UTP
To facilitate the entry and exit of data on media.
Destination Network Address

49. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
IP is not properly installed
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Show Interfaces
Transport

50. What 2 type of cables would most commonly be used for new runs?
Originate data flow.
80 (HTTP)
A. Cat5 UTP b. Cat6 UTP
Host A

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CCNA - 2

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