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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. 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
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.
Configure the switch so that it has a lower priority than other switches in the network.
VLAN and Swtich
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

2. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Application
Sequence number - Window size - and Acknowledgment number
It operates without collisions and It provides faster data transfer
To allow remote management of the switch.

3. Which of the following are true of Ethernet technology?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It will prevent segment 1's broadcasts from getting to segment 2.
Hosts use a logical bus topology
VTP

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?
Layer 4
To allow remote management of the switch.
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.
This is an Ethernet port operating at half duplex

5. 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?
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
Port security
All switch and bridge ports are in either the forwarding or blocking state.

6. 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?
Configure the switch so that it has lower priority than other switches in the network
100 meters
Device Identifiers - Capabilities list - Platform
All switch and bridge ports are in either the forwarding or blocking state.

7. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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 lower priority than other switches in the network

8. 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?
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.
Telnet and FTP
HTTPS - SMTP - and TFTP
Sequence number - Window size - and Acknowledgment number

9. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Sequence number - Window size - and Acknowledgment number
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.
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.
Transport

10. 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?
Configure the switch so that it has lower priority than other switches in the network
TCP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
To allow remote management of the switch.

11. 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?
100 meters
ARP and ICMP
Switches increase the number of collision domains in the network.
An additional broadcast domain will be created.

12. Which fields are included in the TCP header?
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115
It is used to prevent switching loops in networks with redundant switched routes.
Source Port - Acknowledgment Number - and Window

13. 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 sequence number in the TCP header.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.

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
A cross-over cable
Telnet and FTP
VTP will allow switches to share VLAN configuration information

15. Which of the following are types of flow control?
It is the sum of the costs based on bandwidth
Path selections and Packet switching.
Device Identifiers - Capabilities list - Platform
Buffering - Cut-through - and Congestion avoidance

16. 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.
ARP and ICMP
All switch and bridge ports are in either the forwarding or blocking state.
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.

17. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
STP
The system is malfunctioning.
In an improperly implemented redundant topology
VLAN and Swtich

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

19. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - Desirable - and On
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

20. 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?
This is an Ethernet port operating at half duplex
Physical Layer and Datalink Layer
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.
STP

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.
TCP
Learning - Listening - and Forwarding
Application
Auto - On - and Desirable

22. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
The network layer
Packet switching - Packet filtering and Internetwork communication.
HTTPS - SMTP - and TFTP
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

23. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Duplex mismatch
Congestion avoidance - Windowing and Buffering
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 - On - and Desirable

24. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Show arp and Show interface
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.
A broadcast address will never be the source address of a frame
Network

25. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Layer 4
Show cdp neighbor detail
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Data link

26. By default - which of the following factors determines the spanning-tree path cost?
Transport
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
Configure the switch so that it has a lower priority than other switches in the network.

27. 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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28. 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)
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Decrease the window size.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

29. 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?
Sequence number - Window size - and Acknowledgment number
The network layer
ARP and ICMP
VLAN and Swtich

30. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
The switch will forward the frame to a specific port
Physical Layer and Datalink Layer
Transport
Show cdp neighbor detail

31. What is the purpose of the spanning-tree algorithm in a switched LAN?
802.1Q and ISL
Application
To prevent switching loops in networks with redundant switched paths.
Data link

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?
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.
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
The interfaces must be configured for NAT.
An additional broadcast domain will be created.

33. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Network
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

34. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
802.1Q and ISL
The system is malfunctioning.

35. With regard to Ethernet media access methods - which of the following are true?
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.
Encapsulations PPP and authentication CHAP
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.
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.

36. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Sequence number - Window size - and Acknowledgment number
Path selections and Packet switching.
STP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

37. 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
The network layer
A broadcast address will never be the source address of a frame
HTTPS
Duplex mismatch

38. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
HTTPS
Buffering - Cut-through - and Congestion avoidance
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Auto - Desirable - and On

39. What is the IEEE standard associated with Gigabit Ethernet?
Auto - On - and Desirable
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.3ab and 802.3z
ARP and ICMP

40. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
An additional broadcast domain will be created.
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

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?
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
100 meters
Data link
The network layer

42. 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?
This is an Ethernet port operating at 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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The sequence number in the TCP header.

43. 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
The interfaces must be configured for NAT.
100 meters
A hub and A repeater.

44. Which of the following correctly describe the various functions and virtues of a router?
An additional broadcast domain will be created.
VTP
The Bridgeg ID and The bridge priority
Packet switching - Packet filtering and Internetwork communication.

45. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
To prevent switching loops in networks with redundant switched paths.
All switch and bridge ports are in either the forwarding or blocking state.
The system is malfunctioning.
Device Identifiers - Capabilities list - Platform

46. 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?
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
Switches increase the number of collision domains in the network.
Application

47. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
TCP
Increased latency and Filtering of all frame errors
Information about a route should never be sent back in the direction from which the original update came.

48. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
The Bridgeg ID and The bridge priority
Serial0/1 is down - line protocol is down
HTTPS

49. Which of the following correctly describe steps in the OSI date encapsulation process?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
Data link
Decrease the window size.

50. 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?
Telnet and FTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Show cdp neighbor detail
SMTP FTP and HTTP