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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 has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
802.3ab and 802.3z

2. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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
A cross-over cable
A hub and A repeater.
The switch will forward the frame to a specific port

3. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Switches increase the number of collision domains in the network.
Learning - Listening - and Forwarding
The interfaces must be configured for NAT.

4. 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
Show arp and Show interface
100 meters
The system is malfunctioning.
Physical Layer and Datalink Layer

5. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.
Telnet and FTP

6. 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
Port security
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.

7. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VTP will allow switches to share VLAN configuration information
Telnet and FTP
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.
Auto - On - and Desirable

8. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Auto - On - and Desirable
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

9. 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.
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.
Layer 4
Source Port - Acknowledgment Number - and Window

10. 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?
Source Port - Acknowledgment Number - and Window
VTP will allow switches to share VLAN configuration information
Configure the switch so that it has lower priority than other switches in the network
Port security

11. What is the purpose of the spanning-tree algorithm in a switched LAN?
Device Identifiers - Capabilities list - Platform
Show cdp neighbor detail
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.
To prevent switching loops in networks with redundant switched paths.

12. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
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
Port security

13. Which protocol uses TCP port 443 at layer 4?
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
This is an Ethernet port operating at half duplex
HTTPS

14. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
The port is experiencing errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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

15. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A hub and A repeater.
Hosts use a logical bus topology

16. 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?
Certkiller B > trace
VTP
SMTP - FTP - HTTP - and HTTPS
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

17. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
SMTP FTP and HTTP
The system is malfunctioning.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

18. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Transport
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It will prevent segment 1's broadcasts from getting to segment 2.
STP

19. What is the IEEE standard associated with Gigabit Ethernet?
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.
Fiber optic cable.
802.3ab and 802.3z
The port is experiencing errors

20. Which of the following are types of flow control?
Auto - Desirable - and On
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
Layer 4

21. 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
To prevent switching loops in networks with redundant switched paths.
Duplex mismatch
This is an Ethernet port operating at half duplex

22. 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?
Application
All switch and bridge ports are in either the forwarding or blocking state.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.

23. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The interfaces must be configured for NAT.
Application
Network
An electrical pulse indicates that the collision has cleared.

24. 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
Switches increase the number of collision domains in the network.
100 meters
The sequence number in the TCP header.

25. 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 Bridgeg ID and The bridge priority
Sequence number - Window size - and Acknowledgment number
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

26. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Show arp and Show interface
All switch and bridge ports are in either the forwarding or blocking state.
802.3ab and 802.3z
Auto - Desirable - and On

27. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A hub and A repeater.
VLAN and Swtich
Congestion avoidance - Windowing and Buffering

28. 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?
Fiber optic cable.
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
Physical Layer and Datalink Layer

29. 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?
Show arp and Show interface
The port is experiencing errors
Show cdp neighbor detail
An electrical pulse indicates that the collision has cleared.

30. 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?
The switch will forward the frame to a specific port
100 meters
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

31. 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.)
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.
MAC Address and Bridge Priority
Serial0/1 is down - line protocol is down
Information about a route should never be sent back in the direction from which the original update came.

32. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Configure the switch so that it has lower priority than other switches in the network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
ARP and ICMP
Data link

33. 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?
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.
Sequence number - Window size - and Acknowledgment number
Telnet and FTP
Auto - On - and Desirable

34. Which OSI layer header contains the address of a destination host that is on another network?
Increased latency and Filtering of all frame errors
Data link
Network
To prevent switching loops in networks with redundant switched paths.

35. What are two characteristics of 'store and forward' switching?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
To allow remote management of the switch.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
STP

36. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Network
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
Application

37. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Data link
802.1Q and ISL
Show cdp neighbor detail
Certkiller B > trace

38. 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?
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

39. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Serial0/1 is down - line protocol is down
Layer 4
Telnet and FTP

40. 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?
It is the sum of the costs based on bandwidth
A hub and A repeater.
To allow remote management of the switch.
Buffering - Cut-through - and Congestion avoidance

41. 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
Configure the switch so that it has lower priority than other switches in the 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.
Network

42. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Device Identifiers - Capabilities list - Platform
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS

43. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Switches increase the number of collision domains in the network.
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 - Bridges - and Routers
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

44. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
SMTP FTP and HTTP
Transport
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

45. 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?
In an improperly implemented redundant topology
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
Decrease the window size.

46. 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?
An additional broadcast domain will be created.
The sequence number in the TCP header.
Learning - Listening - and Forwarding
Information about a route should never be sent back in the direction from which the original update came.

47. 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.
Encapsulations PPP and authentication CHAP
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.
VTP

48. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
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 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.
Auto - Desirable - and On
STP

49. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
SMTP FTP and HTTP
Physical Layer and Datalink Layer
In an improperly implemented redundant topology
Encapsulations PPP and authentication CHAP

50. Which of the following can lead to the contribution of LAN traffic congestion?
STP
Auto - On - and Desirable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Auto - Desirable - and On