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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. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Switches increase the number of collision domains in the network.
VLAN and Swtich
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

2. 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
Source Port - Acknowledgment Number - and Window
100 meters
Application
The network layer

3. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Fiber optic cable.
Show cdp neighbor detail
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

4. What is the purpose of the spanning-tree algorithm in a switched LAN?
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.
Data link
To prevent switching loops in networks with redundant switched paths.
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.

5. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
SMTP FTP and HTTP
To prevent switching loops in networks with redundant switched paths.
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
Telnet and FTP

6. 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?
The Bridgeg ID and The bridge priority
Configure the switch so that it has a lower priority than other switches in the network.
Switches increase the number of collision domains in the network.
Auto - On - and Desirable

7. 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?
Show cdp neighbor detail
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
The Bridgeg ID and The bridge priority
It is used to prevent switching loops in networks with redundant switched routes.

8. 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?
The switch will forward the frame to a specific port
Data link
It will prevent segment 1's broadcasts from getting to segment 2.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

9. 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?
To allow remote management of the switch.
VTP
Certkiller B > trace
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

10. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
VTP will allow switches to share VLAN configuration information
SMTP FTP and HTTP
The system is malfunctioning.
TCP

11. 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?
Information about a route should never be sent back in the direction from which the original update came.
To allow remote management of the switch.
The interfaces must be configured for NAT.
The sequence number in the TCP header.

12. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
To allow remote management of the switch.
Configure the switch so that it has a lower priority than other switches in the network.
Auto - On - and Desirable
STP

13. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
802.1Q and ISL
To allow remote management of the switch.
Data link

14. 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
A broadcast address will never be the source address of a frame
The switch will forward the frame to a specific port
Show arp and Show interface

15. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Application
Layer 4
Congestion avoidance - Windowing and Buffering
Hosts use a logical bus topology

16. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Show cdp neighbor detail
Increased latency and Filtering of all frame errors
Information about a route should never be sent back in the direction from which the original update came.
Transport

17. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
TCP
In an improperly implemented redundant topology
Decrease the window size.
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 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?
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115
This is an Ethernet port operating at half duplex
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)
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Decrease the window size.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VTP will allow switches to share VLAN configuration information

20. 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 hub and A repeater.
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
ARP and ICMP
Show cdp neighbor detail

21. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.3ab and 802.3z
In an improperly implemented redundant topology
802.1Q and ISL
It is the sum of the costs based on bandwidth

22. 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
Information about a route should never be sent back in the direction from which the original update came.
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS
Duplex mismatch

23. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
An additional broadcast domain will be created.
It is the sum of the costs based on bandwidth
To allow remote management of the switch.

24. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Fiber optic cable.
Switches - Bridges - and Routers
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Source Port - Acknowledgment Number - and Window

25. Which of the following are spanning tree port states?
MAC Address and Bridge Priority
Data link
Learning - Listening - and Forwarding
The port is experiencing errors

26. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Source Port - Acknowledgment Number - and Window
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A broadcast address will never be the source address of a frame
Buffering - Cut-through - and Congestion avoidance

27. 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
Data link
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

28. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The port is experiencing errors
Serial0/1 is down - line protocol is down

29. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
STP
Application
Application

30. 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
Switches - Bridges - and Routers
Serial0/1 is down - line protocol is down
VTP will allow switches to share VLAN configuration information

31. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
SMTP FTP and HTTP
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
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.
802.1Q and ISL

32. 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?
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
A hub and A repeater.
VTP will allow switches to share VLAN configuration information

33. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Sequence number - Window size - and Acknowledgment number
TCP
Data link
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

34. 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?
The switch will forward the frame to a specific port
Sequence number - Window size - and Acknowledgment number
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

35. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Path selections and Packet switching.
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.
Application
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

36. With regard to Ethernet media access methods - which of the following are true?
CertK Switch(config)# ip default-gateway 192.168.1.115
STP
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.
HTTPS

37. 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.)
Sequence number - Window size - and Acknowledgment number
The port is experiencing errors
Device Identifiers - Capabilities list - Platform
MAC Address and Bridge Priority

38. 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?
Configure the switch so that it has a lower priority than other switches in the network.
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.
Hosts use a logical bus topology
ARP and ICMP

39. 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?
An electrical pulse indicates that the collision has cleared.
Port security
A cross-over cable
Show cdp neighbor detail

40. 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?
100 meters
VTP
SMTP - FTP - HTTP - and HTTPS
A hub and A repeater.

41. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
STP
Switches increase the number of collision domains in the network.
The Bridgeg ID and The bridge priority
Show cdp neighbor detail

42. 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.
SMTP FTP and HTTP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.

43. 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?
802.1Q and ISL
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
Show cdp neighbor detail

44. Which of the following correctly describe the various functions and virtues of a router?
The network layer
Packet switching - Packet filtering and Internetwork communication.
The system is malfunctioning.
Port security

45. 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
A hub and A repeater.
Network
Auto - Desirable - and On

46. 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.
It operates without collisions and It provides faster data transfer
MAC Address and Bridge Priority
The system is malfunctioning.

47. Which OSI layer header contains the address of a destination host that is on another network?
Switches increase the number of collision domains in the network.
Auto - On - and Desirable
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Network

48. What is the IEEE standard associated with Gigabit Ethernet?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The port is experiencing errors
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
802.3ab and 802.3z

49. By default - which of the following factors determines the spanning-tree path cost?
802.3ab and 802.3z
Layer 3
802.1Q and ISL
It is the sum of the costs based on bandwidth

50. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Certkiller B > trace
Auto - On - and Desirable
Physical Layer and Datalink Layer