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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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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
MAC Address and Bridge Priority
Path selections and Packet switching.

2. Why is full-duplex Ethernet superior to its single-duplex counterpart?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VLAN and Swtich
It operates without collisions and It provides faster data transfer

3. 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?
The network layer
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
Layer 3
It is the sum of the costs based on bandwidth

4. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Device Identifiers - Capabilities list - Platform
The network layer
Switches increase the number of collision domains in the network.

5. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Sequence number - Window size - and Acknowledgment number
STP
Congestion avoidance - Windowing and Buffering

6. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Increased latency and Filtering of all frame errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
CertK Switch(config)# ip default-gateway 192.168.1.115
All switch and bridge ports are in either the forwarding or blocking state.

7. 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.
Physical Layer and Datalink Layer
The Bridgeg ID and The bridge priority
Switches - Bridges - and Routers
Application

8. 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.
The sequence number in the TCP header.
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 will forward the frame to a specific port

9. Which of the following devices can the Certkiller network administrator use to segment the LAN?
802.3ab and 802.3z
Telnet and FTP
Switches - Bridges - and Routers
Information about a route should never be sent back in the direction from which the original update came.

10. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Increased latency and Filtering of all frame errors
SMTP - FTP - HTTP - and HTTPS
Certkiller B > trace

11. Which of the protocols below use TCP at the transport layer?
Duplex mismatch
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS
Hosts use a logical bus topology

12. What is the purpose of the spanning-tree algorithm in a switched LAN?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Configure the switch so that it has lower priority than other switches in the network
To prevent switching loops in networks with redundant switched paths.

13. Which protocol uses TCP port 443 at layer 4?
HTTPS
Show arp and Show interface
This is an Ethernet port operating at half duplex
802.1Q and ISL

14. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is the sum of the costs based on bandwidth
It is used to prevent switching loops in networks with redundant switched routes.
Learning - Listening - and Forwarding
Device Identifiers - Capabilities list - Platform

15. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Auto - On - and Desirable
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.
VTP will allow switches to share VLAN configuration information

16. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To prevent switching loops in networks with redundant switched paths.
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
TCP

17. 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?
Network
VLAN and Swtich
A hub and A repeater.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

18. 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?
Show cdp neighbor detail
Auto - Desirable - and On
The Bridgeg ID and The bridge priority
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.

19. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
A hub and A repeater.
The network layer
The sequence number in the TCP header.

20. Which fields are included in the TCP header?
Physical Layer and Datalink Layer
Source Port - Acknowledgment Number - and Window
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.

21. 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?
Switches increase the number of collision domains in the network.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
802.1Q and ISL
Increased latency and Filtering of all frame errors

22. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
A hub and A repeater.
All switch and bridge ports are in either the forwarding or blocking state.
802.1Q and ISL

23. 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
HTTPS - SMTP - and TFTP
Source Port - Acknowledgment Number - and Window
An additional broadcast domain will be created.

24. Which OSI layer header contains the address of a destination host that is on another network?
Network
The switch will forward the frame to a specific port
Hosts use a logical bus topology
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.

25. 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?
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.
VTP will allow switches to share VLAN configuration information
Layer 4
An electrical pulse indicates that the collision has cleared.

26. 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?
The interfaces must be configured for NAT.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Fiber optic cable.
VTP

27. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Transport
Fiber optic cable.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

28. 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?
Duplex mismatch
802.3ab and 802.3z
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.

29. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
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
Application
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

30. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Learning - Listening - and Forwarding
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Application

31. 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?
A cross-over cable
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
The system is malfunctioning.
Serial0/1 is down - line protocol is down

32. 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
This is an Ethernet port operating at half duplex
Hosts use a logical bus topology
VTP
Data link

33. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
VTP will allow switches to share VLAN configuration information

34. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Serial0/1 is down - line protocol is down
Increased latency and Filtering of all frame errors
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.

35. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
To prevent switching loops in networks with redundant switched paths.
Port security
This is an Ethernet port operating at half duplex
Transport

36. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP will allow switches to share VLAN configuration information

37. Which of the following are types of flow control?
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.
Buffering - Cut-through - and Congestion avoidance
Serial0/1 is down - line protocol is down
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

38. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Duplex mismatch
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.
Show cdp neighbor detail

39. What kind of cable should be used to establish a trunked line between two Catalyst switches?
MAC Address and Bridge Priority
Configure the switch so that it has a lower priority than other switches in the network.
A cross-over cable
To allow remote management of the switch.

40. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Encapsulations PPP and authentication CHAP
Auto - Desirable - and On
Switches increase the number of collision domains 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

41. 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
Layer 4
VTP will allow switches to share VLAN configuration information
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Serial0/1 is down - line protocol is down

42. Which of the following can lead to the contribution of LAN traffic congestion?
Source Port - Acknowledgment Number - and Window
Too many hosts in a broadcast domain - Broadcast storms and Low 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.
Network

43. 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?
Application
VTP
To allow remote management of the switch.
SMTP FTP and HTTP

44. 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?
802.1Q and ISL
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VLAN and Swtich

45. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches - Bridges - and Routers
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.

46. 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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47. 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?
Switches - Bridges - and Routers
ARP and ICMP
TCP
To allow remote management of the switch.

48. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
The switch will forward the frame to a specific port
Show arp and Show interface
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

49. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Learning - Listening - and Forwarding
VLAN and Swtich
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.

50. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Information about a route should never be sent back in the direction from which the original update came.
Auto - On - and Desirable