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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. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Configure the switch so that it has a lower priority than other switches in the network.
Show cdp neighbor detail
The network layer

2. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
STP
An electrical pulse indicates that the collision has cleared.
Transport
Device Identifiers - Capabilities list - Platform

3. 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?
The port is experiencing errors
The system is malfunctioning.
Serial0/1 is down - line protocol is down
Layer 4

4. 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?
In an improperly implemented redundant topology
Switches - Bridges - and Routers
To allow remote management of the switch.
Network

5. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Auto - On - and Desirable
The system is malfunctioning.
Physical Layer and Datalink Layer
An electrical pulse indicates that the collision has cleared.

6. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS
HTTPS - SMTP - and TFTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
In an improperly implemented redundant topology

7. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
802.1Q and ISL
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 interfaces must be configured for NAT.

8. 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?
Layer 4
A broadcast address will never be the source address of a frame
The network layer
Application

9. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Show cdp neighbor detail
Auto - On - and Desirable
802.1Q and ISL
An electrical pulse indicates that the collision has cleared.

10. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
SMTP - FTP - HTTP - and HTTPS
The sequence number in the TCP header.

11. 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?
SMTP - FTP - HTTP - and HTTPS
Application
100 meters
Hosts use a logical bus topology

12. 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
Source Port - Acknowledgment Number - and Window
Network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Data link

13. 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?
All switch and bridge ports are in either the forwarding or blocking state.
An additional broadcast domain will be created.
CertK Switch(config)# ip default-gateway 192.168.1.115
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.

14. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Show arp and Show interface
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VTP will allow switches to share VLAN configuration information
It is used to prevent switching loops in networks with redundant switched routes.

15. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
It is used to prevent switching loops in networks with redundant switched routes.
To allow remote management of the 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.

16. 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?
Show cdp neighbor detail
The network layer
Configure the switch so that it has lower priority than other switches in the network
Switches increase the number of collision domains in the network.

17. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Application
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Decrease the window size.
A hub and A repeater.

18. 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 sequence number in the TCP header.
Serial0/1 is down - line protocol is down
SMTP - FTP - HTTP - and HTTPS
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.

19. What are two characteristics of 'store and forward' switching?
Duplex mismatch
Path selections and Packet switching.
Congestion avoidance - Windowing and Buffering
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

20. 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 sequence number in the TCP header.
The switch will forward the frame to a specific port
Show cdp neighbor detail
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

21. 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
The network layer
CertK Switch(config)# ip default-gateway 192.168.1.115
Information about a route should never be sent back in the direction from which the original update came.

22. Which of the following correctly describe steps in the OSI date encapsulation process?
Auto - On - and Desirable
A broadcast address will never be the source address of a frame
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.
To prevent switching loops in networks with redundant switched paths.

23. Which OSI layer header contains the address of a destination host that is on another network?
Physical Layer and Datalink Layer
Network
Show arp and Show interface
Fiber optic cable.

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?
802.1Q and ISL
Decrease the window size.
HTTPS
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

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?
Show cdp neighbor detail
Duplex mismatch
Switches - Bridges - and Routers
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

26. 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.
The port is experiencing errors
It is the sum of the costs based on bandwidth
Application

27. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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.
Physical Layer and Datalink Layer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Serial0/1 is down - line protocol is down

28. 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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

29. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Telnet and FTP
VTP
Switches increase the number of collision domains in the network.

30. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
A cross-over cable
Device Identifiers - Capabilities list - Platform
VTP will allow switches to share VLAN configuration information

31. 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?
VTP will allow switches to share VLAN configuration information
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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 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.

32. 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 throughout than can half-duplex Ethernet of the same bandwidth
To allow remote management of the switch.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.

33. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Network
Sequence number - Window size - and Acknowledgment number

34. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Encapsulations PPP and authentication CHAP
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

35. 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
802.3ab and 802.3z
The sequence number in the TCP header.
Show cdp neighbor detail
Application

36. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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37. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Configure the switch so that it has a lower priority than other switches in the network.
In an improperly implemented redundant topology
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The interfaces must be configured for NAT.

38. What is the purpose of the spanning-tree algorithm in a switched LAN?
Data link
To prevent switching loops in networks with redundant switched paths.
Packet switching - Packet filtering and Internetwork communication.
Application

39. 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.
Data link
A hub and A repeater.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

40. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Sequence number - Window size - and Acknowledgment number
A cross-over cable
Encapsulations PPP and authentication CHAP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

41. 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?
TCP
It is used to prevent switching loops in networks with redundant switched routes.
The interfaces must be configured for NAT.
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

42. Which of the following services use TCP?
TCP
To prevent switching loops in networks with redundant switched paths.
SMTP FTP and HTTP
The interfaces must be configured for NAT.

43. 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
Decrease the window size.
An additional broadcast domain will be created.
Data link

44. 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.
It operates without collisions and It provides faster data transfer
Congestion avoidance - Windowing and Buffering
Show arp and Show interface

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?
Configure the switch so that it has a lower priority than other switches in the network.
A cross-over cable
Application
VTP

46. Which of the following are types of flow control?
SMTP - FTP - HTTP - and HTTPS
Application
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Buffering - Cut-through - and Congestion avoidance

47. 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
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show arp and Show interface
VLAN and Swtich

48. 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
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
This is an Ethernet port operating at half duplex

49. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

50. 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?
Port security
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The switch will forward the frame to a specific port
TCP