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CCNA Hard

Instructions:

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. 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?
Switches - Bridges - and Routers
The port is experiencing errors
Layer 4
802.1Q and ISL

2. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Transport
Serial0/1 is down - line protocol is down
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

3. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Port security
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

4. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
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.
Auto - On - and Desirable
Certkiller B > trace

5. Which of the following services use TCP?
Show cdp neighbor detail
The system is malfunctioning.
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.
SMTP FTP and HTTP

6. 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?
Network
Sequence number - Window size - and Acknowledgment number
Duplex mismatch
A hub and A repeater.

7. 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.
Switches increase the number of collision domains in the network.
Show cdp neighbor detail
Auto - Desirable - and On

8. 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.
Telnet and FTP
A cross-over cable
An electrical pulse indicates that the collision has cleared.

9. 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?
Application
Switches increase the number of collision domains in the network.
It is used to prevent switching loops in networks with redundant switched routes.
The system is malfunctioning.

10. 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 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.
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.
Duplex mismatch

11. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Configure the switch so that it has lower priority than other switches in the network
Encapsulations PPP and authentication CHAP
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.
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

12. Which of the following are true of Ethernet technology?
Switches increase the number of collision domains in the network.
A hub and A repeater.
Hosts use a logical bus topology
Transport

13. 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
Switches increase the number of collision domains in the network.
The switch will forward the frame to a specific port
Show arp and Show interface
VLAN and Swtich

14. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
To allow remote management of the switch.
802.1Q and ISL
ARP and ICMP
Switches increase the number of collision domains in the network.

15. 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
Configure the switch so that it has a lower priority than other switches in the network.
Encapsulations PPP and authentication CHAP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

16. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Duplex mismatch
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.
Configure the switch so that it has a lower priority than other switches in the network.
Auto - Desirable - and On

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?
Transport
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.
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

18. 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)
HTTPS
To allow remote management of the switch.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

19. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
An additional broadcast domain will be created.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In an improperly implemented redundant 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.

20. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It is the sum of the costs based on bandwidth
SMTP - FTP - HTTP - and HTTPS
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.

21. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Show cdp neighbor detail
VTP
An additional broadcast domain will be created.

22. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
Congestion avoidance - Windowing and Buffering
To prevent switching loops in networks with redundant switched paths.
The network layer

23. 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
The network layer
The port is experiencing errors
VLAN and Swtich

24. Which of the following correctly describe the various functions and virtues of a router?
Serial0/1 is down - line protocol is down
It operates without collisions and It provides faster data transfer
Decrease the window size.
Packet switching - Packet filtering and Internetwork communication.

25. Which of the following devices can the Certkiller network administrator use to segment the LAN?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Increased latency and Filtering of all frame errors
Switches - Bridges - and Routers
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

26. 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?
Physical Layer and Datalink Layer
The switch will forward the frame to a specific port
CertK Switch(config)# ip default-gateway 192.168.1.115
It is the sum of the costs based on bandwidth

27. 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?
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
Duplex mismatch
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.
100 meters

28. 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.
Application
Configure the switch so that it has a lower priority than other switches in the network.
Duplex mismatch
All switch and bridge ports are in either the forwarding or blocking state.

29. 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
Information about a route should never be sent back in the direction from which the original update came.
The sequence number in the TCP header.
The Bridgeg ID and The bridge priority
Auto - On - and Desirable

30. 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
Packet switching - Packet filtering and Internetwork communication.
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

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

32. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Auto - Desirable - and On
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A cross-over cable
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.

33. 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?
Show arp and Show interface
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To allow remote management of the switch.

34. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
STP

35. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Decrease the window size.
The network layer
Layer 4
Network

36. 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
The network layer
Show cdp neighbor detail
TCP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

37. 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?
An additional broadcast domain will be created.
The network layer
Switches increase the number of collision domains in the network.
Configure the switch so that it has a lower priority than other switches in the network.

38. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
HTTPS
VLAN and Swtich
The interfaces must be configured for NAT.

39. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
Packet switching - Packet filtering and Internetwork communication.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

40. 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
The system is malfunctioning.
The network layer
Hosts use a logical bus topology

41. 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?
Switches increase the number of collision domains in the network.
The Bridgeg ID and The bridge priority
Congestion avoidance - Windowing and Buffering
Device Identifiers - Capabilities list - Platform

42. 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?
ARP and ICMP
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.
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.
An electrical pulse indicates that the collision has cleared.

43. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
It will prevent segment 1's broadcasts from getting to segment 2.
Fiber optic cable.
All switch and bridge ports are in either the forwarding or blocking state.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

44. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The network layer
Layer 4
This is an Ethernet port operating at half duplex
Hosts use a logical bus topology

45. 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?
Configure the switch so that it has lower priority than other switches in the network
Congestion avoidance - Windowing and Buffering
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
Learning - Listening - and Forwarding

46. Which of the following correctly describe steps in the OSI date encapsulation process?
To prevent switching loops in networks with redundant switched paths.
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP - FTP - HTTP - and HTTPS

47. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Auto - Desirable - and On
An electrical pulse indicates that the collision has cleared.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

48. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
The network layer
Switches increase the number of collision domains in the network.
Auto - On - and Desirable
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

49. 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 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 port is experiencing errors
Certkiller B > trace
Auto - Desirable - and On

50. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Telnet and FTP
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.
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

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