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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. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Buffering - Cut-through - and Congestion avoidance
802.1Q and ISL
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.
Application

2. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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
Sequence number - Window size - and Acknowledgment number
Auto - On - and Desirable
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.

3. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Port security
802.3ab and 802.3z
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
802.1Q and ISL

4. 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?
HTTPS - SMTP - and TFTP
MAC Address and Bridge Priority
Port security
The interfaces must be configured for NAT.

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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Fiber optic cable.
The network layer
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

6. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
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.
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
The system is malfunctioning.

7. 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?
Layer 3
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.
All switch and bridge ports are in either the forwarding or blocking state.
VLAN and Swtich

8. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
VTP
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.
ARP and ICMP

9. 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
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
Layer 3
The sequence number in the TCP header.

10. CDP is running between two CK devices. What information is supplied by CDP?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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
Learning - Listening - and Forwarding

11. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
The switch will forward the frame to a specific port
Physical Layer and Datalink Layer
Increased latency and Filtering of all frame errors
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.

12. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Network
802.3ab and 802.3z
All switch and bridge ports are in either the forwarding or blocking state.
Switches - Bridges - and Routers

13. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Configure the switch so that it has lower priority than other switches in the network
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

14. 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?
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
Auto - Desirable - and On
Packet switching - Packet filtering and Internetwork communication.

15. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

16. 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?
Layer 3
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show cdp neighbor detail

17. 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.
Buffering - Cut-through - and Congestion avoidance
Show cdp neighbor detail
The port is experiencing errors

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
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 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
Congestion avoidance - Windowing and Buffering

19. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
A hub and A repeater.
Layer 4

20. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Sequence number - Window size - and Acknowledgment number

21. 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?
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.
TCP
VTP

22. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It will prevent segment 1's broadcasts from getting to segment 2.
The interfaces must be configured for NAT.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

23. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Layer 4
Network
In an improperly implemented redundant topology
This is an Ethernet port operating at half duplex

24. By default - which of the following factors determines the spanning-tree path cost?
Increased latency and Filtering of all frame errors
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 the sum of the costs based on bandwidth
802.3ab and 802.3z

25. Which OSI layer header contains the address of a destination host that is on another network?
STP
Network
Serial0/1 is down - line protocol is down
Telnet and FTP

26. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
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
Transport
Show arp and Show interface

27. What is the purpose of the spanning-tree algorithm in a switched LAN?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
To prevent switching loops in networks with redundant switched paths.
Physical Layer and Datalink Layer

28. 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?
MAC Address and Bridge Priority
Decrease the window size.
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.
Congestion avoidance - Windowing and Buffering

29. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Learning - Listening - and Forwarding
The port is experiencing errors
Auto - Desirable - and On

30. Which of the following services use TCP?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
SMTP FTP and HTTP
Auto - Desirable - and On
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

31. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Layer 3
Data link
The network layer

32. 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
MAC Address and Bridge Priority
VTP
Auto - On - and Desirable

33. 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?
Switches increase the number of collision domains in the network.
Application
It is used to prevent switching loops in networks with redundant switched routes.
Show cdp neighbor detail

34. Which of the following are types of flow control?
It is the sum of the costs based on bandwidth
In an improperly implemented redundant topology
Buffering - Cut-through - and Congestion avoidance
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

35. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
ARP and ICMP
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
Physical Layer and Datalink Layer
Layer 4

36. 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
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Encapsulations PPP and authentication CHAP

37. 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?
Congestion avoidance - Windowing and Buffering
CertK Switch(config)# ip default-gateway 192.168.1.115
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

38. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
In an improperly implemented redundant topology
Switches - Bridges - and Routers
Auto - On - and Desirable
Serial0/1 is down - line protocol is down

39. 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?
Device Identifiers - Capabilities list - Platform
The network layer
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.
MAC Address and Bridge Priority

40. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.
All switch and bridge ports are in either the forwarding or blocking state.

41. Which of the following are true of Ethernet technology?
The interfaces must be configured for NAT.
Hosts use a logical bus topology
A hub and A repeater.
Decrease the window size.

42. 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.
Certkiller B > trace
Auto - Desirable - and On
The port is experiencing errors

43. 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.
Hosts use a logical bus topology
It is used to prevent switching loops in networks with redundant switched routes.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

44. 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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45. 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?
Physical Layer and Datalink Layer
Application
Auto - On - and Desirable
Learning - Listening - and Forwarding

46. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The system is malfunctioning.
Transport
Switches increase the number of collision domains in the network.
VLAN and Swtich

47. 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
An electrical pulse indicates that the collision has cleared.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Application
VLAN and Swtich

48. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
This is an Ethernet port operating at half duplex
An electrical pulse indicates that the collision has cleared.

49. Which fields are included in the TCP header?
The system is malfunctioning.
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Source Port - Acknowledgment Number - and Window

50. 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?
Packet switching - Packet filtering and Internetwork communication.
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.
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.