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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. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Auto - Desirable - and On
To prevent switching loops in networks with redundant switched paths.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The network layer

2. 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
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
Auto - Desirable - and On
TCP
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.

3. 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.)
Auto - On - and Desirable
It will prevent segment 1's broadcasts from getting to segment 2.
MAC Address and Bridge Priority
Source Port - Acknowledgment Number - and Window

4. 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?
Congestion avoidance - Windowing and Buffering
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
SMTP FTP and HTTP

5. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
802.1Q and ISL
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Application

6. 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 Bridgeg ID and The bridge priority
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
Physical Layer and Datalink Layer

7. 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?
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
Increased latency and Filtering of all frame errors
ARP and ICMP

8. Which two of the following values does STP take into consideration when it elects the root bridge?
Configure the switch so that it has lower priority than other switches in the network
Fiber optic cable.
The Bridgeg ID and The bridge priority
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

9. 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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

10. With regard to Ethernet media access methods - which of the following are true?
Layer 4
Certkiller B > trace
Packet switching - Packet filtering and Internetwork communication.
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.

11. Which of the following can lead to the contribution of LAN traffic congestion?
Network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Application

12. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Encapsulations PPP and authentication CHAP
Show cdp neighbor detail
A broadcast address will never be the source address of a frame
The system is malfunctioning.

13. Which of the protocols below use TCP at the transport layer?
Switches - Bridges - and Routers
The system is malfunctioning.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
SMTP - FTP - HTTP - and HTTPS

14. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Application
The switch will forward the frame to a specific port
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.
Auto - Desirable - and On

15. 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?
A cross-over cable
Learning - Listening - and Forwarding
Configure the switch so that it has a lower priority than other switches 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.

16. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
SMTP - FTP - HTTP - and HTTPS
Application
Path selections and Packet switching.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

17. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Source Port - Acknowledgment Number - and Window
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.
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

18. Which of the following are true of Ethernet technology?
Application
Transport
The sequence number in the TCP header.
Hosts use a logical bus topology

19. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A cross-over cable

20. 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
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

21. Which OSI layer header contains the address of a destination host that is on another network?
Source Port - Acknowledgment Number - and Window
Network
Data link
In an improperly implemented redundant topology

22. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Data link
Path selections and Packet switching.
VTP will allow switches to share VLAN configuration information
In an improperly implemented redundant topology

23. 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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24. 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
TCP
Data link
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches increase the number of collision domains in the network.

25. 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
Certkiller B > trace
The network layer
Device Identifiers - Capabilities list - Platform
HTTPS

26. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on 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.
Learning - Listening - and Forwarding
An electrical pulse indicates that the collision has cleared.
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.

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?
MAC Address and Bridge Priority
Layer 4
Increased latency and Filtering of all frame errors
CertK Switch(config)# ip default-gateway 192.168.1.115

28. Why is full-duplex Ethernet superior to its single-duplex counterpart?
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
Duplex mismatch
Auto - Desirable - and On
It operates without collisions and It provides faster data transfer

29. 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?
A hub and A repeater.
The system is malfunctioning.
An additional broadcast domain will be created.
Information about a route should never be sent back in the direction from which the original update came.

30. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Application
ARP and ICMP
CertK Switch(config)# ip default-gateway 192.168.1.115

31. In a switched LAN network - What is the Spanning-Tree algorithm used for?
To allow remote management of the switch.
HTTPS - SMTP - and TFTP
It is used to prevent switching loops in networks with redundant switched routes.
In an improperly implemented redundant topology

32. 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 address will never be the source address of a frame
Packet switching - Packet filtering and Internetwork communication.
Too many hosts in a broadcast domain - Broadcast storms and Low 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. 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?
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.
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has a lower priority than other switches in the network.
Switches increase the number of collision domains in the network.

34. 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?
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
Network
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors

35. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
All switch and bridge ports are in either the forwarding or blocking state.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

36. Which of the following are types of flow control?
Congestion avoidance - Windowing and Buffering
Buffering - Cut-through - and Congestion avoidance
Source Port - Acknowledgment Number - and Window
HTTPS - SMTP - and TFTP

37. What are two characteristics of 'store and forward' switching?
In an improperly implemented redundant topology
Packet switching - Packet filtering and Internetwork communication.
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

38. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The Bridgeg ID and The bridge priority
Layer 4
Increased latency and Filtering of all frame errors
STP

39. Which of the following devices can the Certkiller network administrator use to segment the LAN?
The switch will forward the frame to a specific port
The system is malfunctioning.
Switches - Bridges - and Routers
Hosts use a logical bus topology

40. Which fields are included in the TCP header?
Application
Source Port - Acknowledgment Number - and Window
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

41. 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?
HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

42. 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?
It is the sum of the costs based on bandwidth
Auto - Desirable - and On
Path selections and Packet switching.
The switch will forward the frame to a specific port

43. 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
It is the sum of the costs based on bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
Information about a route should never be sent back in the direction from which the original update came.
VLAN and Swtich

44. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Sequence number - Window size - and Acknowledgment number
The network layer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

45. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Data link
802.1Q and ISL
A hub and A repeater.
SMTP - FTP - HTTP - and HTTPS

46. 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
The system is malfunctioning.
Learning - Listening - and Forwarding
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

47. Which of the following services use TCP?
Encapsulations PPP and authentication CHAP
Switches - Bridges - and Routers
SMTP FTP and HTTP
Layer 4

48. CDP is running between two CK devices. What information is supplied by CDP?
The interfaces must be configured for NAT.
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.
Device Identifiers - Capabilities list - Platform
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.

49. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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.
A broadcast address will never be the source address of a frame
An electrical pulse indicates that the collision has cleared.
VLAN and Swtich

50. 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?
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.
An additional broadcast domain will be created.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
ARP and ICMP