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CCNA Hard

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. 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.
All switch and bridge ports are in either the forwarding or blocking state.
Layer 4
Learning - Listening - and Forwarding

2. 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.
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Duplex mismatch

3. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Port security
The sequence number in the TCP header.
Auto - On - and Desirable
It is used to prevent switching loops in networks with redundant switched routes.

4. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The network layer
An additional broadcast domain will be created.
A cross-over cable
SMTP - FTP - HTTP - and HTTPS

5. 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 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 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 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.

6. Which of the following correctly describe steps in the OSI date encapsulation process?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same 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.
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 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.

7. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Certkiller B > trace
It operates without collisions and It provides faster data transfer
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.

8. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Buffering - Cut-through - and Congestion avoidance
Decrease the window size.
In an improperly implemented redundant topology

9. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
The sequence number in the TCP header.
VTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches increase the number of collision domains in the network.

10. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
802.3ab and 802.3z
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Encapsulations PPP and authentication CHAP
Increased latency and Filtering of all frame errors

11. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
TCP
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The network layer

12. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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 need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Packet switching - Packet filtering and Internetwork communication.
VTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
CertK Switch(config)# ip default-gateway 192.168.1.115

14. 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.
Auto - On - and Desirable
Device Identifiers - Capabilities list - Platform
HTTPS - SMTP - and TFTP

15. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
A broadcast address will never be the source address of a frame
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.
It operates without collisions and It provides faster data transfer

16. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
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
TCP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

17. 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?
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 - On - and Desirable
Port security
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

18. 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?
Show cdp neighbor detail
Data link
An electrical pulse indicates that the collision has cleared.
The network layer

19. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
In an improperly implemented redundant topology
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

20. 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
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
Path selections and Packet switching.
Switches increase the number of collision domains 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.

21. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Packet switching - Packet filtering and Internetwork communication.
This is an Ethernet port operating at half duplex

22. 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?
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.
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
An additional broadcast domain will be created.

23. 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?
Layer 4
Switches increase the number of collision domains in the network.
The system is malfunctioning.
VTP will allow switches to share VLAN configuration information

24. 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?
Data link
This is an Ethernet port operating at half duplex
VLAN and Swtich
A hub and A repeater.

25. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.
It is the sum of the costs based on bandwidth
Certkiller B > trace

26. 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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Path selections and Packet switching.
Network

27. 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?
TCP
A hub and A repeater.
Show arp and Show interface
Physical Layer and Datalink Layer

28. 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.
Device Identifiers - Capabilities list - Platform
HTTPS
Serial0/1 is down - line protocol is down

29. Which two of the following values does STP take into consideration when it elects the root bridge?
The interfaces must be configured for NAT.
It operates without collisions and It provides faster data transfer
A hub and A repeater.
The Bridgeg ID and The bridge priority

30. 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?
Duplex mismatch
An additional broadcast domain will be created.
Decrease the window size.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

31. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Configure the switch so that it has a lower priority than other switches in the network.
The switch will forward the frame to a specific port

32. 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
Auto - On - and Desirable
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show arp and Show interface
Fiber optic cable.

33. 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?
TCP
An additional broadcast domain will be created.
Transport
The network layer

34. Which fields are included in the TCP header?
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.
Source Port - Acknowledgment Number - and Window
The network layer
ARP and ICMP

35. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
In an improperly implemented redundant topology
Show cdp neighbor detail
Hosts use a logical bus topology

36. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Buffering - Cut-through - and Congestion avoidance
Encapsulations PPP and authentication CHAP

37. Which protocol uses TCP port 443 at layer 4?
An additional broadcast domain will be created.
HTTPS
All switch and bridge ports are in either the forwarding or blocking state.
An electrical pulse indicates that the collision has cleared.

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.
MAC Address and Bridge Priority
Application
To prevent switching loops in networks with redundant switched paths.
Buffering - Cut-through - and Congestion avoidance

39. 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?
STP
The interfaces must be configured for NAT.
It operates without collisions and It provides faster data transfer
CertK Switch(config)# ip default-gateway 192.168.1.115

40. 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?
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 port is experiencing errors
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.

41. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
SMTP - FTP - HTTP - and HTTPS
STP

42. 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 interfaces must be configured for NAT.
A broadcast address will never be the source address of a frame
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
It is used to prevent switching loops in networks with redundant switched routes.

43. Which of the protocols below use TCP at the transport layer?
Path selections and Packet switching.
A cross-over cable
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
SMTP - FTP - HTTP - and HTTPS

44. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
100 meters
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.
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

45. Which of the following services use TCP?
Increased latency and Filtering of all frame errors
SMTP FTP and HTTP
Layer 4
Buffering - Cut-through - and Congestion avoidance

46. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
STP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

47. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Device Identifiers - Capabilities list - Platform

48. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
STP
Layer 4
HTTPS - SMTP - and TFTP

49. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
The system is malfunctioning.
The network layer
A broadcast address will never be the source address of a frame
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

50. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Application
Increased latency and Filtering of all frame errors
This is an Ethernet port operating at half duplex
All switch and bridge ports are in either the forwarding or blocking state.

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