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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Auto - Desirable - and On
Duplex mismatch

2. 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
Hosts use a logical bus topology
STP
Packet switching - Packet filtering and Internetwork communication.

3. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Decrease the window size.
A broadcast address will never be the source address of a frame
Transport
HTTPS - SMTP - and TFTP

4. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link
SMTP FTP and HTTP
MAC Address and Bridge Priority

5. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Packet switching - Packet filtering and Internetwork communication.
SMTP FTP and HTTP
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
Port security

6. Which of the following can lead to the contribution of LAN traffic congestion?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 3
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
SMTP FTP and HTTP

7. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority
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.

8. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

9. Which protocol uses TCP port 443 at layer 4?
Auto - On - and Desirable
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.
HTTPS
HTTPS - SMTP - and TFTP

10. 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
Source Port - Acknowledgment Number - and Window
STP
Increased latency and Filtering of all frame errors

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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A broadcast address will never be the source address of a frame
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

12. 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?
It is the sum of the costs based on bandwidth
Port security
Data link
An additional broadcast domain will be created.

13. 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?
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
TCP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.3ab and 802.3z

14. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Switches increase the number of collision domains in the network.
Sequence number - Window size - and Acknowledgment number
Serial0/1 is down - line protocol is down

15. 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.
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.
Configure the switch so that it has lower priority than other switches in the network
In an improperly implemented redundant topology

16. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Serial0/1 is down - line protocol is down
Application
802.3ab and 802.3z

17. 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
Duplex mismatch
The Bridgeg ID and The bridge priority
It is the sum of the costs based on bandwidth
Configure the switch so that it has a lower priority than other switches in the network.

18. 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?
Certkiller B > trace
VLAN and Swtich
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP

19. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
TCP
Information about a route should never be sent back in the direction from which the original update came.
Telnet and FTP

20. 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?
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.
Show arp and Show interface
Switches increase the number of collision domains in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115

21. Which of the following are true of Ethernet technology?
This is an Ethernet port operating at half duplex
The interfaces must be configured for NAT.
Hosts use a logical bus topology
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.

22. By default - which of the following factors determines the spanning-tree path cost?
Layer 3
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
Switches increase the number of collision domains in the network.

23. 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
Switches increase the number of collision domains in the network.
802.3ab and 802.3z
Port security

24. 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?
Switches - Bridges - and Routers
The network layer
VTP
VTP will allow switches to share VLAN configuration information

25. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An electrical pulse indicates that the collision has cleared.
All switch and bridge ports are in either the forwarding or blocking state.

26. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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 cross-over cable
Buffering - Cut-through - and Congestion avoidance
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.

27. Which three of the protocols below belong to the application layer? (Select three answer choices)
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.
Switches - Bridges - and Routers
MAC Address and Bridge Priority
HTTPS - SMTP - and TFTP

28. 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?
VTP will allow switches to share VLAN configuration information
An additional broadcast domain will be created.
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has lower priority than other switches in the network

29. 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.)
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
MAC Address and Bridge Priority
The sequence number in the TCP header.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

30. 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?
Configure the switch so that it has lower priority than other switches in the network
VLAN and Swtich
The interfaces must be configured for NAT.
All switch and bridge ports are in either the forwarding or blocking state.

31. With regard to Ethernet media access methods - which of the following are true?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Certkiller B > trace
It is used to prevent switching loops in networks with redundant switched routes.
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.

32. In a switched LAN network - What is the Spanning-Tree algorithm used for?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
TCP
MAC Address and Bridge Priority
It is used to prevent switching loops in networks with redundant switched routes.

33. 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
Network
Path selections and Packet switching.
The sequence number in the TCP header.
Switches increase the number of collision domains in the network.

34. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Certkiller B > trace
HTTPS - SMTP - and TFTP
All switch and bridge ports are in either the forwarding or blocking state.
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.

35. 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?
SMTP FTP and HTTP
Physical Layer and Datalink Layer
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.
Data link

36. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Layer 4
Path selections and Packet switching.
Decrease the window size.

37. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
HTTPS - SMTP - and TFTP
The Bridgeg ID and The bridge priority
A broadcast address will never be the source address of a frame
Path selections and Packet switching.

38. 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?
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.
Certkiller B > trace
Show cdp neighbor detail
A hub and A repeater.

39. Which of the following correctly describe steps in the OSI date encapsulation process?
Network
Device Identifiers - Capabilities list - Platform
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.
Serial0/1 is down - line protocol is down

40. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
VTP will allow switches to share VLAN configuration information
Application
The network layer
The system is malfunctioning.

41. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Network
STP
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame

42. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
A broadcast address will never be the source address of a frame
Layer 4
HTTPS
Encapsulations PPP and authentication CHAP

43. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
The interfaces must be configured for NAT.
A hub and A repeater.
VLAN and Swtich

44. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Physical Layer and Datalink Layer
Path selections and Packet switching.
HTTPS

45. Which of the following services use TCP?
Configure the switch so that it has a lower priority than other switches in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115
VTP
SMTP FTP and HTTP

46. 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.
Network
Application
Fiber optic cable.
TCP

47. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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 allow remote management of the switch.
The interfaces must be configured for NAT.

48. What is the IEEE standard associated with Gigabit Ethernet?
HTTPS
802.3ab and 802.3z
ARP and ICMP
802.1Q and ISL

49. 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?
A cross-over cable
Switches increase the number of collision domains in the network.
An electrical pulse indicates that the collision has cleared.
Show cdp neighbor detail

50. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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
Data link
Physical Layer and Datalink Layer

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