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. What type of network cable is used between a terminal and a console port?
Rollover cable
Any device whose backoff timer expires first.
Window Size
Binary ANDing


2. Where is the IOS file stored at?
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 random delay helps prevent the stations from experiencing another collision during transmission.
Flash
A. it has centralized administration b. security is easier to enforce


3. 2 functions of encapsulation
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
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. HTTP b. HTTPS
Any device whose backoff timer expires first.


4. What are 3 properties of contention-based media access for a shared media?
DNS
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. non-deterministic b. less overhead c. collisions exist
The destination host address.


5. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Physical
When connecting a host to a switch.


6. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Hosts return to listen-before-transmit mode.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Logical Link Control sublayer


7. 2 characteristics of clients in data networks
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. they initiate data exchanges b. they may upload data to servers
A. copper UTP b. optical fiber
255.255.255.224


8. If you have a full-duplex operational network - what can happen?
80 (HTTP)
Destination Network Address
No collisions will occur on this link.
A. they initiate data exchanges b. they may upload data to servers


9. Important characteristic of UDP
Minimal delays in data delivery.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Supports error detection.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations


10. What makes fiber preferable to copper for interconnecting buildings?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Network address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
OTDR


11. If you have a small network w/ 3 computers...
Resolve IPv4 addresses to MAC addresses.
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
255.255.255.224
A. show startup-config b. show running-config


12. What can you identify when you examine the Network Layer header?
Rollover cable
Show Interfaces
The destination host address.
The address of the router that the host will use to 'get to the other side'.


13. Network Protocols
A. larger address space b. data types and classes of service c. authentication and encryption
Network Media Control
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
80 (HTTP)


14. statements of IP adressing
A. DNS b. SMTP c. POP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
UTP
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


15. What is a component of a routing table entry?
It has expanded adressing capabilities.
255.255.255.0
Next-Hop Address
A. purpose b. geographic location c. ownership


16. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. media sharing b. logical topology
Host mobility


17. Which device is used to create or divide broadcast domains?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Time-to-live (TTL)
Router


18. When a network service fails - which port is most often used to access a router for management purposes?
The physical address is added.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Network Layer
Console


19. What statements describe the logical token-passing topology?
255.255.255.0
Source Port
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
80 (HTTP)


20. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Switch
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
It uses lasers as the light source.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions


21. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
80 (HTTP)
UDP
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


22. What do the intermediary devices in the network do?
When connecting a host to a switch.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Twisting of the cables
A physical topology.


23. 3 statements about routes and their use
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. DNS b. SMTP c. POP
255.255.255.0
Hub


24. What is a protocol that provides connectionless network layer services?
A. MTA b. SMTP
Application Layer
IP Protocol
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry


25. Intermediary devices used to implement security between networks
A. copper UTP b. optical fiber
The address of the router that the host will use to 'get to the other side'.
A. router b. firewall
Destination Network Address


26. What characteristic of an UTP helps reduce interference?
A. flow control b. session establishment c. numbering and sequencing
A. application b. services
Twisting of the cables
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential


27. 3 features of IPv6
A default gateway (router).
The address of the router that the host will use to 'get to the other side'.
A. larger address space b. data types and classes of service c. authentication and encryption
A. decentralized resources b. resource sharing w/o a dedicated server


28. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
As the commands are entered.
UTP
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations


29. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Window Size
Transport
A. copper UTP b. optical fiber
A. Physical b. Data Link


30. When a device is moved from one network to the other...?
A. flow control b. session establishment c. numbering and sequencing
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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
Rollover cable


31. 3 measures of data transfer
Binary ANDing
Network portion
A. show startup-config b. show running-config
A. goodput b. throughput c. bandwidth


32. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
The physical address is added.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Media Control


33. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
Hub
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)


34. What do you need to use for an initial configuration on a Cisco router?
Console interface
Source and Destination IP address
The magnetic field around the adjacent pairs of wire.
Network Access


35. What causes crosstalk within cable pairs when using UTP?
The address of the router that the host will use to 'get to the other side'.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. flow control b. session establishment c. numbering and sequencing
The magnetic field around the adjacent pairs of wire.


36. 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
A. enable mode b. priviledge executive mode
0 to 1023
Identify the device that allows local network computers to communicate w/ devices in other networks.


37. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Hub
Source Port
A. DB 60 b. Winchester 15-pin c. smart serial


38. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Originate data flow.
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# interface FastEthernet 0/1
A. replace a switch w/ a router b. subnet the new networks


39. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
A. application b. services
To enable a receiving host to forward the data to the appropriate application.
OTDR


40. What are 2 forms of application layer software?
A. application b. services
Network Layer
Fiber
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry


41. What correctly describes a MAC address?
Supports error detection.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
The MAC protocol can be very simple.
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


42. If there is a graphic representation of a company network wiring and equipment - What is this called?
UTP
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. the router will discard the packet b. the router will send a time exceeded message to the source host
A physical topology.


43. 3 protocols that operate in the application layer
Rollover cable
A. DNS b. SMTP c. POP
Ctrl + Shift + 6
Show Interfaces


44. What are 3 pieces of info about a route contained in a routing table?
OTDR
Originate data flow.
A. next-hop b. metric/interface c. destination network address
The address of the router that the host will use to 'get to the other side'.


45. What is the primary purpose of Layer 4?
The physical address is added.
Identify processes or services that are communicating with end devices.
MAC
A. non-deterministic b. less overhead c. collisions exist


46. What is a disadvantage of Telnet?
Is a layer of specific encapsulation.
It does not support encryption.
Hub
A. DB 60 b. Winchester 15-pin c. smart serial


47. 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
Destination Network Address
MAC
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions


48. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
255.255.255.224
No collisions will occur on this link.
Destination Network Address
80 (HTTP)


49. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
RJ-45
A. performance degradation b. security issues c. host identification
TCP initializes the sequence numbers for the sessions.


50. 3 facts about the network portion of an IPv4 address
A. servers b. routers c. network printers
A. flow control b. session establishment c. numbering and sequencing
It provides interface between applications on either end of the network.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet