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

2. By default - which of the following factors determines the spanning-tree path cost?
100 meters
The system is malfunctioning.
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
It is the sum of the costs based on bandwidth

3. 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.
Device Identifiers - Capabilities list - Platform
VTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

4. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches increase the number of collision domains in the network.
A cross-over cable
Switches - Bridges - and Routers
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.

5. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
ARP and ICMP
Device Identifiers - Capabilities list - Platform
The port is experiencing errors
In an improperly implemented redundant topology

6. 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?
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.
Layer 4
Switches - Bridges - and Routers
Telnet and FTP

7. 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.
Network
Fiber optic cable.
VTP

8. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
A hub and A repeater.
The network layer
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

9. Which of the following are spanning tree port states?
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
Device Identifiers - Capabilities list - Platform
The system is malfunctioning.

10. Which of the following correctly describe the various functions and virtues of a router?
MAC Address and Bridge Priority
Packet switching - Packet filtering and Internetwork communication.
Network
Increased latency and Filtering of all frame errors

11. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The switch will forward the frame to a specific port
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
MAC Address and Bridge Priority
Network

12. 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?
Decrease the window size.
802.3ab and 802.3z
VTP will allow switches to share VLAN configuration information
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

13. 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
Network
The network layer
Data link
100 meters

14. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP
VLAN and Swtich
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.

15. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Learning - Listening - and Forwarding
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.
Transport

16. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
The switch will forward the frame to a specific port
Certkiller B > trace
All switch and bridge ports are in either the forwarding or blocking state.
A broadcast address will never be the source address of a frame

17. Which of the following correctly describe steps in the OSI date encapsulation process?
Transport
It is used to prevent switching loops in networks with redundant switched routes.
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.
Increased latency and Filtering of all frame errors

18. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The system is malfunctioning.
Switches increase the number of collision domains in the network.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

19. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Telnet and FTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Hosts use a logical bus topology
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.

20. 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?
SMTP - FTP - HTTP - and HTTPS
Sequence number - Window size - and Acknowledgment number
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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

21. Which of the following are true of Ethernet technology?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Hosts use a logical bus 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 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.

22. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
The Bridgeg ID and The bridge priority
A cross-over 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

23. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Packet switching - Packet filtering and Internetwork communication.
TCP
802.1Q and ISL
The Bridgeg ID and The bridge priority

24. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
All switch and bridge ports are in either the forwarding or blocking state.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Certkiller B > trace

25. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
STP
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 address will never be the source address of a frame

26. 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?
STP
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Show arp and Show interface

27. 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?
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

28. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Network
The interfaces must be configured for NAT.
802.1Q and ISL
It will prevent segment 1's broadcasts from getting to segment 2.

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?
Sequence number - Window size - and Acknowledgment number
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application
An electrical pulse indicates that the collision has cleared.

30. 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
The interfaces must be configured for NAT.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Auto - On - and Desirable

31. 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?
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has a lower priority than other switches in the network.
Decrease the window size.

32. 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
Decrease the window size.
The port is experiencing errors
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.

33. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Auto - On - and Desirable

34. 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 network layer
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
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.

35. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
A hub and A repeater.
The system is malfunctioning.
HTTPS - SMTP - and TFTP
Telnet and FTP

36. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Serial0/1 is down - line protocol is down
Auto - Desirable - and On
MAC Address and Bridge Priority
Encapsulations PPP and authentication CHAP

37. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Show cdp neighbor detail
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority
Layer 4

38. 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.
In an improperly implemented redundant topology
Application
To prevent switching loops in networks with redundant switched paths.
This is an Ethernet port operating at half duplex

39. 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?
VTP
To allow remote management of the switch.
Source Port - Acknowledgment Number - and Window
A hub and A repeater.

40. Which of the following services use TCP?
SMTP FTP and HTTP
Auto - On - and Desirable
Show arp and Show interface
Congestion avoidance - Windowing and Buffering

41. 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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42. 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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The sequence number in the TCP header.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

43. What is the purpose of the spanning-tree algorithm in a switched LAN?
STP
SMTP - FTP - HTTP - and HTTPS
Decrease the window size.
To prevent switching loops in networks with redundant switched paths.

44. 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?
Switches increase the number of collision domains in the network.
Port security
Configure the switch so that it has lower priority than other switches in the network
The network layer

45. 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?
100 meters
802.3ab and 802.3z
It is the sum of the costs based on bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

46. Which OSI layer header contains the address of a destination host that is on another network?
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 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
Information about a route should never be sent back in the direction from which the original update came.
Network

47. 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?
VTP
Configure the switch so that it has lower priority than other switches in the network
SMTP - FTP - HTTP - and HTTPS
802.1Q and ISL

48. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
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.
ARP and ICMP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

49. Which of the following are types of flow control?
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.
The Bridgeg ID and The bridge priority
Buffering - Cut-through - and Congestion avoidance
It will prevent segment 1's broadcasts from getting to segment 2.

50. 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.
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
Configure the switch so that it has lower priority than other switches in the network
Certkiller B > trace