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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. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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 port is experiencing errors
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.
Data link

2. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Sequence number - Window size - and Acknowledgment number
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.
VTP will allow switches to share VLAN configuration information
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.

3. 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?
Sequence number - Window size - and Acknowledgment number
Serial0/1 is down - line protocol is down
Telnet and FTP
Application

4. Which protocol uses TCP port 443 at layer 4?
802.1Q and ISL
HTTPS
HTTPS - SMTP - and TFTP
SMTP FTP and HTTP

5. 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)
To prevent switching loops in networks with redundant switched paths.
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

6. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
100 meters
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Packet switching - Packet filtering and Internetwork communication.

7. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Switches increase the number of collision domains in the network.
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.
STP
802.1Q and ISL

8. Which of the following correctly describe steps in the OSI date encapsulation process?
VLAN and Swtich
In an improperly implemented redundant topology
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.
Serial0/1 is down - line protocol is down

9. 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?
Transport
A hub and A repeater.
SMTP - FTP - HTTP - and HTTPS
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.

10. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
VLAN and Swtich
STP
A broadcast address will never be the source address of a frame
Device Identifiers - Capabilities list - Platform

11. Why is full-duplex Ethernet superior to its single-duplex counterpart?
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.
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It operates without collisions and It provides faster data transfer

12. Which of the following correctly describe the various functions and virtues of a router?
Fiber optic cable.
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
Packet switching - Packet filtering and Internetwork communication.

13. What is the IEEE standard associated with Gigabit Ethernet?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
802.3ab and 802.3z
It will prevent segment 1's broadcasts from getting to segment 2.

14. Which two of the following values does STP take into consideration when it elects the root bridge?
An additional broadcast domain will be created.
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 Bridgeg ID and The bridge priority
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.

15. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
802.3ab and 802.3z
100 meters
Auto - Desirable - and On

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?
VTP
Switches increase the number of collision domains in the network.
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 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.

17. 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?
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.
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.
Switches increase the number of collision domains in the network.

18. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Application
Show arp and Show interface
Application
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.

19. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Source Port - Acknowledgment Number - and Window
The port is experiencing errors
Path selections and Packet switching.

20. 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
Physical Layer and Datalink Layer
The network layer
The switch will forward the frame to a specific port
Path selections and Packet switching.

21. 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.
The network 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.
Application
Data link

22. 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?
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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.

23. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Configure the switch so that it has lower priority than other switches in the network
An additional broadcast domain will be created.

24. By default - which of the following factors determines the spanning-tree path cost?
The sequence number in the TCP header.
The network layer
It is the sum of the costs based on bandwidth
Network

25. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
It is the sum of the costs based on bandwidth
Congestion avoidance - Windowing and Buffering
Layer 4
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

26. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Application
Switches - Bridges - and Routers
Buffering - Cut-through - and Congestion avoidance
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

27. 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?
HTTPS - SMTP - and TFTP
STP
Sequence number - Window size - and Acknowledgment number
Layer 4

28. 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?
Physical Layer and Datalink Layer
Sequence number - Window size - and Acknowledgment number
Telnet and FTP
An electrical pulse indicates that the collision has cleared.

29. 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
Layer 3
Switches - Bridges - and Routers
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.
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.

30. 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?
This is an Ethernet port operating at half duplex
The port is experiencing errors
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VLAN and Swtich

31. Which three of the protocols below belong to the application layer? (Select three answer choices)
Serial0/1 is down - line protocol is down
It is used to prevent switching loops in networks with redundant switched routes.
HTTPS - SMTP - and TFTP
Telnet and FTP

32. 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?
This is an Ethernet port operating at half duplex
HTTPS - SMTP - and TFTP
Source Port - Acknowledgment Number - and Window
Switches increase the number of collision domains in the network.

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?
Certkiller B > trace
Layer 3
Path selections and Packet switching.
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.

34. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
In an improperly implemented redundant topology
A hub and A repeater.
Network
Configure the switch so that it has lower priority than other switches in the network

35. Which of the following are true of Ethernet technology?
Telnet and FTP
STP
Hosts use a logical bus topology
Network

36. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
This is an Ethernet port operating at half duplex
Show arp and Show interface
A broadcast address will never be the source address of a frame
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

37. 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.)
Sequence number - Window size - and Acknowledgment number
The system is malfunctioning.
MAC Address and Bridge Priority
Show arp and Show interface

38. 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?
Auto - On - and Desirable
MAC Address and Bridge Priority
To allow remote management of the switch.
HTTPS

39. Which of the following are spanning tree port states?
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
Telnet and FTP
Application

40. 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?
Auto - Desirable - and On
Data link
The switch will forward the frame to a specific port
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

41. In a switched LAN network - What is the Spanning-Tree algorithm used for?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
It is used to prevent switching loops in networks with redundant switched routes.
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.
Auto - Desirable - and On

42. CDP is running between two CK devices. What information is supplied by CDP?
To allow remote management of the switch.
Switches increase the number of collision domains in the network.
Device Identifiers - Capabilities list - Platform
Switches - Bridges - and Routers

43. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS
Application
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

44. What are two characteristics of 'store and forward' switching?
The network layer
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.
Layer 4
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

45. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches - Bridges - and Routers
STP
Port security
Switches increase the number of collision domains in the network.

46. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Layer 3
HTTPS
The sequence number in the TCP header.

47. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Data link
Duplex mismatch
Switches - Bridges - and Routers
A cross-over cable

48. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
STP
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

49. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Layer 4
VLAN and Swtich
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Show cdp neighbor detail

50. 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
Data link
Certkiller B > trace
VLAN and Swtich
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth