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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. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
VTP

2. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
In an improperly implemented redundant topology
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Path selections and Packet switching.

3. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
The interfaces must be configured for NAT.
SMTP - FTP - HTTP - and HTTPS
It will prevent segment 1's broadcasts from getting to segment 2.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

4. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Device Identifiers - Capabilities list - Platform
Data link
Congestion avoidance - Windowing and Buffering

5. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Switches increase the number of collision domains in the network.

6. 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?
This is an Ethernet port operating at half duplex
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Encapsulations PPP and authentication CHAP
Configure the switch so that it has a lower priority than other switches in the network.

7. What is the purpose of the spanning-tree algorithm in a switched LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
802.1Q and ISL
To prevent switching loops in networks with redundant switched paths.
Fiber optic cable.

8. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
SMTP - FTP - HTTP - and HTTPS
All switch and bridge ports are in either the forwarding or blocking state.

9. Which fields are included in the TCP header?
Show arp and Show interface
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.
Source Port - Acknowledgment Number - and Window
Transport

10. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Show arp and Show interface
VTP will allow switches to share VLAN configuration information
The sequence number in the TCP header.
This is an Ethernet port operating at half duplex

11. 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
Data link
The sequence number in the TCP header.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

12. 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
In an improperly implemented redundant topology
STP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

13. 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?
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
To prevent switching loops in networks with redundant switched paths.
The interfaces must be configured for NAT.

14. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
The network layer
A cross-over cable
Application
Path selections and Packet switching.

15. 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?
Data link
To allow remote management of the switch.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.

16. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
An additional broadcast domain will be created.
Hosts use a logical bus topology
Information about a route should never be sent back in the direction from which the original update came.
Auto - Desirable - and On

17. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Port security
802.3ab and 802.3z
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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

18. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
The port is experiencing errors
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
The Bridgeg ID and The bridge priority

19. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Configure the switch so that it has a lower priority than other switches in the network.
STP
All switch and bridge ports are in either the forwarding or blocking state.
VTP will allow switches to share VLAN configuration information

20. 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.)
TCP
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
MAC Address and Bridge Priority

21. 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
In an improperly implemented redundant topology
A broadcast address will never be the source address of a frame
Configure the switch so that it has lower priority than other switches in the network

22. 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?
The network layer
Configure the switch so that it has lower priority than other switches in the network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.

23. Which of the following are true of Ethernet technology?
Show cdp neighbor detail
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.
Show arp and Show interface

24. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The Bridgeg ID and The bridge priority
ARP and ICMP
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.

25. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Layer 4
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Data link
TCP

26. 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.
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

27. 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
802.3ab and 802.3z
The network layer
It operates without collisions and It provides faster data transfer

28. 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
An additional broadcast domain will be created.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
In an improperly implemented redundant topology

29. 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 will forward the frame to a specific port
VTP will allow switches to share VLAN configuration information
VLAN and Swtich
SMTP FTP and HTTP

30. Which of the following are types of flow control?
Sequence number - Window size - and Acknowledgment number
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Buffering - Cut-through - and Congestion avoidance

31. 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?
Certkiller B > trace
The port is experiencing errors
VTP
Application

32. 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
A cross-over cable
Congestion avoidance - Windowing and Buffering
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

33. Which of the following correctly describe steps in the OSI date encapsulation process?
SMTP - FTP - HTTP - and HTTPS
The port is experiencing errors
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

34. 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?
Application
Configure the switch so that it has lower priority than other switches in the network
Congestion avoidance - Windowing and Buffering
The network layer

35. 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?
Information about a route should never be sent back in the direction from which the original update came.
Auto - On - and Desirable
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.

36. 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?
Serial0/1 is down - line protocol is down
An electrical pulse indicates that the collision has cleared.
HTTPS - SMTP - and TFTP
It is used to prevent switching loops in networks with redundant switched routes.

37. Which OSI layer header contains the address of a destination host that is on another network?
802.3ab and 802.3z
Network
Show cdp neighbor detail
VTP will allow switches to share VLAN configuration information

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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Physical Layer and Datalink Layer
A hub and A repeater.
Application

39. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Source Port - Acknowledgment Number - and Window
Device Identifiers - Capabilities list - Platform
Increased latency and Filtering of all frame errors

40. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Telnet and FTP

41. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 4
The network layer
It will prevent segment 1's broadcasts from getting to segment 2.

42. 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?
Telnet and FTP
Sequence number - Window size - and Acknowledgment number
Application
Duplex mismatch

43. 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?
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
100 meters
Show cdp neighbor detail
Increased latency and Filtering of all frame errors

44. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Auto - On - and Desirable
CertK Switch(config)# ip default-gateway 192.168.1.115
ARP and ICMP

45. 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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46. 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
It is used to prevent switching loops in networks with redundant switched routes.
Physical Layer and Datalink Layer
To allow remote management of the switch.

47. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
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.
TCP
HTTPS - SMTP - and TFTP
HTTPS

48. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Congestion avoidance - Windowing and Buffering
SMTP - FTP - HTTP - and HTTPS
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A cross-over cable

49. Which protocol uses TCP port 443 at layer 4?
Source Port - Acknowledgment Number - and Window
HTTPS
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A hub and A repeater.

50. 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?
VTP
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.
This is an Ethernet port operating at half duplex
All switch and bridge ports are in either the forwarding or blocking state.