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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. Which three of the protocols below belong to the application layer? (Select three answer choices)
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.
HTTPS - SMTP - and TFTP
Network
Encapsulations PPP and authentication CHAP

2. 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
Switches - Bridges - and Routers
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.
MAC Address and Bridge Priority

3. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
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.
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology

4. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Data link
Transport
It will prevent segment 1's broadcasts from getting to segment 2.
Application

5. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The network layer
A cross-over cable
Path selections and Packet switching.
Buffering - Cut-through - and Congestion avoidance

6. 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.
It is the sum of the costs based on bandwidth
Information about a route should never be sent back in the direction from which the original update came.
Device Identifiers - Capabilities list - Platform

7. By default - which of the following factors determines the spanning-tree path cost?
Information about a route should never be sent back in the direction from which the original update came.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
It is the sum of the costs based on bandwidth
Sequence number - Window size - and Acknowledgment number

8. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
Port security
Hosts use a logical bus topology
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.

9. 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?
To allow remote management of the switch.
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
HTTPS - SMTP - and TFTP
Packet switching - Packet filtering and Internetwork communication.

10. 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?
Telnet and FTP
The switch will forward the frame to a specific port
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

11. Which of the following can lead to the contribution of LAN traffic congestion?
Learning - Listening - and Forwarding
VLAN and Swtich
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Duplex mismatch

12. 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.)
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.
It is the sum of the costs based on bandwidth
MAC Address and Bridge Priority
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

13. 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?
SMTP FTP and HTTP
100 meters
Switches - Bridges - and Routers
Switches increase the number of collision domains in the network.

14. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
802.3ab and 802.3z
To allow remote management of the switch.
Congestion avoidance - Windowing and Buffering

15. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The Bridgeg ID and The bridge priority
VTP will allow switches to share VLAN configuration information
Transport
The network layer

16. Which of the following are spanning tree port states?
Layer 4
Auto - Desirable - and On
Learning - Listening - and Forwarding
Encapsulations PPP and authentication CHAP

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
Encapsulations PPP and authentication CHAP
Auto - On - and Desirable
The switch will forward the frame to a specific port
Fiber optic cable.

18. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
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
Show cdp neighbor detail
TCP
Encapsulations PPP and authentication CHAP

19. 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?
Telnet and FTP
Information about a route should never be sent back in the direction from which the original update came.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP - FTP - HTTP - and HTTPS

20. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

21. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
In an improperly implemented redundant topology
Serial0/1 is down - line protocol is down
Auto - Desirable - and On

22. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
Layer 4
A hub and A repeater.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Sequence number - Window size - and Acknowledgment number

23. 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?
It is the sum of the costs based on bandwidth
VTP
Serial0/1 is down - line protocol is down
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

24. Which of the protocols below use TCP at the transport layer?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
VTP will allow switches to share VLAN configuration information
Physical Layer and Datalink Layer
SMTP - FTP - HTTP - and HTTPS

25. Which protocol uses TCP port 443 at layer 4?
Device Identifiers - Capabilities list - Platform
A hub and A repeater.
HTTPS
VTP

26. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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.
Switches increase the number of collision domains in the network.
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.

27. With regard to Ethernet media access methods - which of the following are true?
All switch and bridge ports are in either the forwarding or blocking state.
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
SMTP FTP and HTTP

28. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
A broadcast address will never be the source address of a frame
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
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.

29. Which of the following are types of flow control?
HTTPS - SMTP - and TFTP
VTP will allow switches to share VLAN configuration information
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering

30. 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?
802.1Q and ISL
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.
Duplex mismatch
It is used to prevent switching loops in networks with redundant switched routes.

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?
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.
Auto - On - and Desirable
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.

32. 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
802.1Q and ISL
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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 sequence number in the TCP header.

33. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
This is an Ethernet port operating at half duplex
Information about a route should never be sent back in the direction from which the original update came.
802.1Q and ISL
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.

34. In a switched LAN network - What is the Spanning-Tree algorithm used for?
HTTPS
This is an Ethernet port operating at half duplex
Certkiller B > trace
It is used to prevent switching loops in networks with redundant switched routes.

35. 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?
Source Port - Acknowledgment Number - and Window
The Bridgeg ID and The bridge priority
All switch and bridge ports are in either the forwarding or blocking state.
The interfaces must be configured for NAT.

36. Which of the following correctly describe the various functions and virtues of a router?
HTTPS
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Increased latency and Filtering of all frame errors
Packet switching - Packet filtering and Internetwork communication.

37. Which of the following devices can the Certkiller network administrator use to segment the LAN?
CertK Switch(config)# ip default-gateway 192.168.1.115
Switches - Bridges - and Routers
Show arp and Show interface
Layer 3

38. 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.
Source Port - Acknowledgment Number - and Window
The switch will forward the frame to a specific port
Network

39. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Congestion avoidance - Windowing and Buffering
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.
Auto - Desirable - and On

40. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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 prevent switching loops in networks with redundant switched paths.
Network
Encapsulations PPP and authentication CHAP

41. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
It is the sum of the costs based on bandwidth
STP
An additional broadcast domain will be created.
Hosts use a logical bus topology

42. 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.
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.
MAC Address and Bridge Priority

43. 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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44. 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
Congestion avoidance - Windowing and Buffering
The sequence number in the TCP header.
VLAN and Swtich
VTP will allow switches to share VLAN configuration information

45. 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
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.
Port security

46. 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
SMTP FTP and HTTP
Fiber optic cable.
Show cdp neighbor detail

47. 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?
It is the sum of the costs based on bandwidth
The network layer
Decrease the window size.
CertK Switch(config)# ip default-gateway 192.168.1.115

48. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
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 throughout than can half-duplex Ethernet of the same bandwidth
Decrease the window size.

49. 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?
Buffering - Cut-through - and Congestion avoidance
The port is experiencing errors
This is an Ethernet port operating at half duplex
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

50. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
It operates without collisions and It provides faster data transfer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Congestion avoidance - Windowing and Buffering
Certkiller B > trace