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CCNA Hard

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. 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
This is an Ethernet port operating at half duplex
The network layer
VTP
A broadcast address will never be the source address of a frame

2. 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.
Path selections and Packet switching.
Layer 4
In an improperly implemented redundant topology
Application

3. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
Auto - Desirable - and On
802.1Q and ISL

4. 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?
Data link
Show arp and Show interface
Application
Configure the switch so that it has a lower priority than other switches in the network.

5. With regard to Ethernet media access methods - which of the following are true?
VTP
ARP and ICMP
100 meters
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.

6. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has lower priority than other switches in the network
All switch and bridge ports are in either the forwarding or blocking state.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

7. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A cross-over cable
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.
Data link

8. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Device Identifiers - Capabilities list - Platform
Network
Transport
The interfaces must be configured for NAT.

9. 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?
Increased latency and Filtering of all frame errors
It operates without collisions and It provides faster data transfer
Serial0/1 is down - line protocol is down
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

10. Which of the following correctly describe the various functions and virtues of a router?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Packet switching - Packet filtering and Internetwork communication.
HTTPS - SMTP - and TFTP
SMTP - FTP - HTTP - and HTTPS

11. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Layer 4
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
Device Identifiers - Capabilities list - Platform
Auto - Desirable - and On

12. 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?
MAC Address and Bridge Priority
Information about a route should never be sent back in the direction from which the original update came.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
VTP

13. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
ARP and ICMP
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.
VLAN and Swtich

14. 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?
A hub and A repeater.
It is the sum of the costs based on bandwidth
Application
Layer 3

15. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
The interfaces must be configured for NAT.
VTP
MAC Address and Bridge Priority
Configure the switch so that it has lower priority than other switches in the network

16. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Increased latency and Filtering of all frame errors
Fiber optic cable.
A broadcast address will never be the source address of a frame

17. 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?
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Data link
Transport

18. 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
Switches - Bridges - and Routers
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Telnet and FTP

19. Which of the following correctly describe steps in the OSI date encapsulation process?
Sequence number - Window size - and Acknowledgment number
VTP
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.
Port security

20. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Switches increase the number of collision domains in the network.
ARP and ICMP
SMTP - FTP - HTTP - and HTTPS
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

21. Why is full-duplex Ethernet superior to its single-duplex counterpart?
SMTP FTP and HTTP
To prevent switching loops in networks with redundant switched paths.
TCP
It operates without collisions and It provides faster data transfer

22. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Sequence number - Window size - and Acknowledgment number
Telnet and FTP
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.
All switch and bridge ports are in either the forwarding or blocking state.

23. 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?
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.
100 meters
To allow remote management of the switch.
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.

24. 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.)
MAC Address and Bridge Priority
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Congestion avoidance - Windowing and Buffering
Port security

25. 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?
Information about a route should never be sent back in the direction from which the original update came.
Encapsulations PPP and authentication CHAP
Show cdp neighbor detail
ARP and ICMP

26. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Hosts use a logical bus topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Sequence number - Window size - and Acknowledgment number
TCP

27. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
The sequence number in the TCP header.
Decrease the window size.
Network
Application

28. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
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.
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
802.1Q and ISL

29. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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.
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.
Application
Network

30. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Learning - Listening - and Forwarding
Layer 4
Data link
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.

31. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

32. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The interfaces must be configured for NAT.
The network layer
VTP will allow switches to share VLAN configuration information
To allow remote management of the switch.

33. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
Congestion avoidance - Windowing and Buffering
Network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The system is malfunctioning.

34. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
Sequence number - Window size - and Acknowledgment number
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
HTTPS - SMTP - and TFTP
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.

35. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
The network layer
An additional broadcast domain will be created.
Layer 4
Auto - On - and Desirable

36. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
The Bridgeg ID and The bridge priority
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.

37. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Fiber optic cable.
VLAN and Swtich

38. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
The network layer
The network layer
Layer 4
Duplex mismatch

39. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Switches increase the number of collision domains in the network.
Layer 4
MAC Address and Bridge Priority
HTTPS

40. Which OSI layer header contains the address of a destination host that is on another network?
Network
Layer 3
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Device Identifiers - Capabilities list - Platform

41. What is the IEEE standard associated with Gigabit Ethernet?
Certkiller B > trace
To prevent switching loops in networks with redundant switched paths.
SMTP - FTP - HTTP - and HTTPS
802.3ab and 802.3z

42. 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?
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.
Decrease the window size.
Increased latency and Filtering of all frame errors

43. Which of the following can lead to the contribution of LAN traffic congestion?
It is used to prevent switching loops in networks with redundant switched routes.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
It operates without collisions and It provides faster data transfer

44. What are two characteristics of 'store and forward' switching?
SMTP - FTP - HTTP - and HTTPS
It is the sum of the costs based on bandwidth
Increased latency and Filtering of all frame errors
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

45. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
To allow remote management of the switch.
The sequence number in the TCP header.
Port security
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

46. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Increased latency and Filtering of all frame errors
Fiber optic cable.

47. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Switches increase the number of collision domains in the network.
An electrical pulse indicates that the collision has cleared.
SMTP FTP and HTTP

48. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
This is an Ethernet port operating at half duplex
Port security
The system is malfunctioning.
Encapsulations PPP and authentication CHAP

49. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
TCP
Fiber optic cable.
Learning - Listening - and Forwarding

50. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Path selections and Packet switching.
Data link
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.