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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. 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?
Duplex mismatch
Sequence number - Window size - and Acknowledgment number
Transport
CertK Switch(config)# ip default-gateway 192.168.1.115

2. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Switches increase the number of collision domains in the network.
VTP

3. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
An electrical pulse indicates that the collision has cleared.
The system is malfunctioning.
Switches increase the number of collision domains in the network.
Serial0/1 is down - line protocol is down

4. 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
100 meters
It will prevent segment 1's broadcasts from getting to segment 2.

5. 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?
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.
Switches increase the number of collision domains in the network.
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

6. 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?
VLAN and Swtich
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Decrease the window size.

7. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
SMTP FTP and HTTP
The switch will forward the frame to a specific port
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

8. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Serial0/1 is down - line protocol is down
A broadcast address will never be the source address of a frame
Network
All switch and bridge ports are in either the forwarding or blocking state.

9. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Transport
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance

10. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
Hosts use a logical bus topology
VTP will allow switches to share VLAN configuration information
Congestion avoidance - Windowing and Buffering

11. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
It operates without collisions and It provides faster data transfer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Auto - Desirable - and On
VTP will allow switches to share VLAN configuration information

12. 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
Fiber optic cable.
The system is malfunctioning.
MAC Address and Bridge Priority
ARP and ICMP

13. 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?
Configure the switch so that it has lower priority than other switches in the network
A broadcast address will never be the source address of a frame
802.3ab and 802.3z
A hub and A repeater.

14. 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?
Network
Increased latency and Filtering of all frame errors
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Buffering - Cut-through - and Congestion avoidance

15. 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?
Increased latency and Filtering of all frame errors
Switches increase the number of collision domains in the network.
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.

16. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
To allow remote management of the switch.
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.
STP

17. 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?
Network
Transport
Layer 3
This is an Ethernet port operating at half duplex

18. 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
VLAN and Swtich
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

19. 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
Transport
Configure the switch so that it has lower priority than other switches in the network
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.

20. 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
The sequence number in the TCP header.
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.
Decrease the window size.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

21. 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?
Buffering - Cut-through - and Congestion avoidance
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.
Show cdp neighbor detail
The interfaces must be configured for NAT.

22. 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
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.
Device Identifiers - Capabilities list - Platform
Duplex mismatch
The interfaces must be configured for NAT.

23. Which of the following services use TCP?
Show arp and Show interface
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
An electrical pulse indicates that the collision has cleared.
SMTP FTP and HTTP

24. Which of the following are spanning tree port states?
Switches increase the number of collision domains in the network.
Learning - Listening - and Forwarding
A cross-over cable
Application

25. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
The port is experiencing errors
Layer 3
Information about a route should never be sent back in the direction from which the original update came.

26. 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
Network
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.
Increased latency and Filtering of all frame errors

27. CDP is running between two CK devices. What information is supplied by CDP?
Show arp and Show interface
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.
STP
Device Identifiers - Capabilities list - Platform

28. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
802.3ab and 802.3z
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
The sequence number in the TCP header.

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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Show arp and Show interface
To allow remote management of the switch.
The network layer

30. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Transport
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - On - and Desirable
SMTP FTP and HTTP

31. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Show cdp neighbor detail
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
Serial0/1 is down - line protocol is down

32. 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?
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 cross-over cable
The interfaces must be configured for NAT.
802.3ab and 802.3z

33. 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?
Show cdp neighbor detail
To allow remote management of the switch.
An additional broadcast domain will be created.
ARP and ICMP

34. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Transport
Duplex mismatch
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It operates without collisions and It provides faster data transfer

35. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
TCP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Path selections and Packet switching.
Layer 3

36. 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?
An electrical pulse indicates that the collision has cleared.
VTP will allow switches to share VLAN configuration information
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

37. By default - which of the following factors determines the spanning-tree path cost?
Duplex mismatch
It is the sum of the costs based on bandwidth
It is used to prevent switching loops in networks with redundant switched routes.
Source Port - Acknowledgment Number - and Window

38. 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 interfaces must be configured for NAT.
Layer 4
The switch will forward the frame to a specific port
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.

39. 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?
Physical Layer and Datalink Layer
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.
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.
Telnet and FTP

40. 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?
An electrical pulse indicates that the collision has cleared.
VLAN and Swtich
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 switch will forward the frame to a specific port

41. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
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.
HTTPS - SMTP - and TFTP
Show cdp neighbor detail

42. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
SMTP FTP and HTTP
Path selections and Packet switching.
Configure the switch so that it has a lower priority than other switches in the network.

43. 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 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.
The network layer
Network
Information about a route should never be sent back in the direction from which the original update came.

44. 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?
SMTP - FTP - HTTP - and HTTPS
The Bridgeg ID and The bridge priority
Buffering - Cut-through - and Congestion avoidance
The switch will forward the frame to a specific port

45. Which OSI layer header contains the address of a destination host that is on another network?
Increased latency and Filtering of all frame errors
Buffering - Cut-through - and Congestion avoidance
The switch will forward the frame to a specific port
Network

46. With regard to Ethernet media access methods - which of the following are true?
Transport
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 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
Packet switching - Packet filtering and Internetwork communication.

47. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The network layer
To prevent switching loops in networks with redundant switched paths.
Information about a route should never be sent back in the direction from which the original update came.
VLAN and Swtich

48. 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 Bridgeg ID and The bridge priority
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
All switch and bridge ports are in either the forwarding or blocking state.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

49. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The system is malfunctioning.
Transport
Data link
Learning - Listening - and Forwarding

50. 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?
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
CertK Switch(config)# ip default-gateway 192.168.1.115
The port is experiencing errors
HTTPS