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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. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
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.
Congestion avoidance - Windowing and Buffering
A hub and A repeater.
VLAN and Swtich

2. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
SMTP FTP and HTTP
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
Switches increase the number of collision domains in the network.
Serial0/1 is down - line protocol is down

3. 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
Duplex mismatch
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A hub and A repeater.
The switch will forward the frame to a specific port

4. With regard to Ethernet media access methods - which of the following are true?
Auto - Desirable - and On
It operates without collisions and It provides faster data transfer
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.

5. 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?
Certkiller B > trace
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Data link

6. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
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
Physical Layer and Datalink Layer
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.
Information about a route should never be sent back in the direction from which the original update came.

7. 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?
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
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
VTP will allow switches to share VLAN configuration information

8. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Network
The system is malfunctioning.
It operates without collisions and It provides faster data transfer

9. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The port is experiencing errors
This is an Ethernet port operating at half duplex
VTP

10. 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?
Layer 3
CertK Switch(config)# ip default-gateway 192.168.1.115
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.

11. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
Certkiller B > trace
The port is experiencing errors
Show arp and Show interface
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.

12. 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
ARP and ICMP
Show arp and Show interface
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

13. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Layer 4
The port is experiencing errors
Sequence number - Window size - and Acknowledgment number

14. 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)
HTTPS
STP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Device Identifiers - Capabilities list - Platform

15. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Encapsulations PPP and authentication CHAP
STP
TCP

16. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Switches increase the number of collision domains in the network.
The Bridgeg ID and The bridge priority
Network

17. Why is full-duplex Ethernet superior to its single-duplex counterpart?
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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
It operates without collisions and It provides faster data transfer

18. 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?
Transport
Telnet and FTP
The interfaces must be configured for NAT.
Data link

19. 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?
Switches increase the number of collision domains in the network.
VTP
Source Port - Acknowledgment Number - and Window
Path selections and Packet switching.

20. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
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.
An electrical pulse indicates that the collision has cleared.
Increased latency and Filtering of all frame errors
HTTPS - SMTP - and TFTP

21. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
TCP
It is used to prevent switching loops in networks with redundant switched routes.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

22. 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
HTTPS - SMTP - and TFTP
Data link
Physical Layer and Datalink Layer
Increased latency and Filtering of all frame errors

23. What is the IEEE standard associated with Gigabit Ethernet?
An additional broadcast domain will be created.
Show cdp neighbor detail
It is the sum of the costs based on bandwidth
802.3ab and 802.3z

24. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
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
Network
It is used to prevent switching loops in networks with redundant switched routes.

25. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Transport
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It operates without collisions and It provides faster data transfer

26. 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?
An electrical pulse indicates that the collision has cleared.
Transport
Path selections and Packet switching.
The switch will forward the frame to a specific port

27. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show cdp neighbor detail
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.
Layer 4

28. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
Switches increase the number of collision domains in the network.
A hub and A repeater.
VLAN and Swtich
HTTPS

29. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Application
SMTP - FTP - HTTP - and HTTPS
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

30. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Sequence number - Window size - and Acknowledgment number
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP will allow switches to share VLAN configuration information
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

31. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Congestion avoidance - Windowing and Buffering
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.
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.
Switches increase the number of collision domains in the network.

32. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
ARP and ICMP
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
Encapsulations PPP and authentication CHAP
Source Port - Acknowledgment Number - and Window

33. 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?
Layer 3
Information about a route should never be sent back in the direction from which the original update came.
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.
SMTP FTP and HTTP

34. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Duplex mismatch
802.3ab and 802.3z
802.1Q and ISL
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.

35. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The network layer
An electrical pulse indicates that the collision has cleared.
To prevent switching loops in networks with redundant switched paths.
Network

36. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Learning - Listening - and Forwarding
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.

37. Which of the following correctly describe steps in the OSI date encapsulation process?
The switch will forward the frame to a specific port
The network layer
Duplex mismatch
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.

38. 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?
Auto - On - and Desirable
The switch will forward the frame to a specific port
Sequence number - Window size - and Acknowledgment number
Decrease the window size.

39. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
Data link
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

40. Which fields are included in the TCP header?
An electrical pulse indicates that the collision has cleared.
Source Port - Acknowledgment Number - and Window
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
802.3ab and 802.3z

41. 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
A cross-over cable
The sequence number in the TCP header.
A hub and A repeater.
Serial0/1 is down - line protocol is down

42. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
An electrical pulse indicates that the collision has cleared.
Application
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

43. 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?
HTTPS
All switch and bridge ports are in either the forwarding or blocking state.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Learning - Listening - and Forwarding

44. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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.
Port security
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.
SMTP FTP and HTTP

45. 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?
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 network layer
Configure the switch so that it has a lower priority than other switches in the network.
In an improperly implemented redundant topology

46. Which OSI layer header contains the address of a destination host that is on another network?
Network
100 meters
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.
It is used to prevent switching loops in networks with redundant switched routes.

47. 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.
Duplex mismatch
To allow remote management of the switch.
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
Application

48. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A cross-over cable
Transport
In an improperly implemented redundant topology

49. Which two of the following values does STP take into consideration when it elects the root bridge?
Data link
The Bridgeg ID and The bridge priority
Switches increase the number of collision domains in the network.
Layer 3

50. By default - which of the following factors determines the spanning-tree path cost?
Source Port - Acknowledgment Number - and Window
It is the sum of the costs based on bandwidth
Layer 4
ARP and ICMP