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CCNA Hard

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. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

2. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches increase the number of collision domains in the network.
Path selections and Packet switching.
Show cdp neighbor detail
In an improperly implemented redundant topology

3. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Configure the switch so that it has a lower priority than other switches in the network.
TCP
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.

4. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
To prevent switching loops in networks with redundant switched paths.
Transport
The network layer
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.

5. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
Learning - Listening - and Forwarding
Transport
Auto - Desirable - and On

6. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
Configure the switch so that it has a lower priority than other switches in the network.
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

7. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
Layer 4
Application
802.3ab and 802.3z
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.

8. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
CertK Switch(config)# ip default-gateway 192.168.1.115
Data link
802.1Q and ISL

9. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Switches increase the number of collision domains in the network.
VTP will allow switches to share VLAN configuration information
Information about a route should never be sent back in the direction from which the original update came.
The network layer

10. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
100 meters
VTP
To prevent switching loops in networks with redundant switched paths.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

11. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
Increased latency and Filtering of all frame errors
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
The switch will forward the frame to a specific port
VTP

12. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
100 meters
It operates without collisions and It provides faster data transfer
Decrease the window size.

13. What is the purpose of the spanning-tree algorithm in a switched LAN?
Network
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
To prevent switching loops in networks with redundant switched paths.

14. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
The system is malfunctioning.
Telnet and FTP
Auto - Desirable - and On

15. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
SMTP - FTP - HTTP - and HTTPS
Information about a route should never be sent back in the direction from which the original update came.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
HTTPS

16. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
Switches - Bridges - and Routers
Layer 3
Data link
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

17. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
Auto - Desirable - and On
An additional broadcast domain will be created.
100 meters
Configure the switch so that it has lower priority than other switches in the network

18. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Information about a route should never be sent back in the direction from which the original update came.
802.1Q and ISL
Path selections and Packet switching.
A hub and A repeater.

19. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding

20. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
Data link
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

21. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A hub and A repeater.
Transport

22. Which OSI layer header contains the address of a destination host that is on another network?
Packet switching - Packet filtering and Internetwork communication.
Network
The network layer
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.

23. Which of the following services use TCP?
SMTP FTP and HTTP
TCP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Application

24. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Buffering - Cut-through - and Congestion avoidance
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Data link
VTP will allow switches to share VLAN configuration information

25. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
This is an Ethernet port operating at half duplex
MAC Address and Bridge Priority
Duplex mismatch
Show cdp neighbor detail

26. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Fiber optic cable.
The network layer
Port security
Configure the switch so that it has a lower priority than other switches in the network.

27. What are two characteristics of 'store and forward' switching?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Telnet and FTP

28. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP - FTP - HTTP - and HTTPS
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
Decrease the window size.

29. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
It will prevent segment 1's broadcasts from getting to segment 2.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Show arp and Show interface
To allow remote management of the switch.

30. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Serial0/1 is down - line protocol is down
SMTP FTP and HTTP

31. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
STP
All switch and bridge ports are in either the forwarding or blocking state.
In an improperly implemented redundant topology
To allow remote management of the switch.

32. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Congestion avoidance - Windowing and Buffering
Serial0/1 is down - line protocol is down
Layer 3
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

33. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
VTP will allow switches to share VLAN configuration information
Telnet and FTP
Switches - Bridges - and Routers
Layer 3

34. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Fiber optic cable.
STP
The interfaces must be configured for NAT.
VTP

35. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A hub and A repeater.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
HTTPS
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

36. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
802.3ab and 802.3z
It is the sum of the costs based on bandwidth
Congestion avoidance - Windowing and Buffering

37. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
SMTP - FTP - HTTP - and HTTPS
The network layer
Layer 4
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

38. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Physical Layer and Datalink Layer
TCP
The Bridgeg ID and The bridge priority
Increased latency and Filtering of all frame errors

39. Which two of the following values does STP take into consideration when it elects the root bridge?
SMTP - FTP - HTTP - and HTTPS
An electrical pulse indicates that the collision has cleared.
The Bridgeg ID and The bridge priority
Auto - Desirable - and On

40. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
This is an Ethernet port operating at half duplex
ARP and ICMP
The port is experiencing errors
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

41. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Certkiller B > trace
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority

42. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
All switch and bridge ports are in either the forwarding or blocking state.
The network layer
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting

43. With regard to Ethernet media access methods - which of the following are true?
This is an Ethernet port operating at half duplex
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
To allow remote management of the switch.

44. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
To allow remote management of the switch.
HTTPS
Layer 4

45. What is the IEEE standard associated with Gigabit Ethernet?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP
The network layer
802.3ab and 802.3z

46. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Transport
Show cdp neighbor detail
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

47. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Increased latency and Filtering of all frame errors
Encapsulations PPP and authentication CHAP
Path selections and Packet switching.
A cross-over cable

48. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
CertK Switch(config)# ip default-gateway 192.168.1.115
Buffering - Cut-through - and Congestion avoidance
Source Port - Acknowledgment Number - and Window

49. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
HTTPS - SMTP - and TFTP
Transport
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
This is an Ethernet port operating at half duplex

50. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
To prevent switching loops in networks with redundant switched paths.
An electrical pulse indicates that the collision has cleared.
Show arp and Show interface
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private

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