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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. What is the IEEE standard associated with Gigabit Ethernet?
Fiber optic cable.
802.3ab and 802.3z
A hub and A repeater.
This is an Ethernet port operating at half duplex

2. 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?
Layer 3
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Transport
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.

3. Which of the protocols below use TCP at the transport layer?
The port is experiencing errors
Path selections and Packet switching.
100 meters
SMTP - FTP - HTTP - and HTTPS

4. 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
The network layer
Fiber optic cable.
Switches - Bridges - and Routers
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

5. 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?
Switches increase the number of collision domains in the network.
TCP
Show cdp neighbor detail
Layer 4

6. 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?
Serial0/1 is down - line protocol is down
This is an Ethernet port operating at half duplex
Increased latency and Filtering of all frame errors
The Bridgeg ID and The bridge priority

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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS - SMTP - and TFTP
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.

8. 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.
The sequence number in the TCP header.
Show arp and Show interface
Fiber optic cable.

9. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Switches - Bridges - and Routers
Switches increase the number of collision domains in the network.
Telnet and FTP

10. 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?
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.
Layer 3
Fiber optic cable.

11. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
SMTP FTP and HTTP
Application
STP
An additional broadcast domain will be created.

12. 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?
A broadcast address will never be the source address of a frame
Configure the switch so that it has a lower priority than other switches in the network.
MAC Address and Bridge Priority
The sequence number in the TCP header.

13. 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?
The interfaces must be configured for NAT.
STP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Port security

14. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Network
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.
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.
Path selections and Packet switching.

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

16. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
STP
Configure the switch so that it has lower priority than other switches in the network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

17. By default - which of the following factors determines the spanning-tree path cost?
Hosts use a logical bus topology
It is the sum of the costs based on bandwidth
The network layer
Data link

18. 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
Source Port - Acknowledgment Number - and Window
Show arp and Show interface
The sequence number in the TCP header.
Duplex mismatch

19. 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?
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The port is experiencing errors
Encapsulations PPP and authentication CHAP

20. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Application
Switches - Bridges - and Routers
802.1Q and ISL

21. 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
Physical Layer and Datalink Layer
Duplex mismatch
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.

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
Duplex mismatch
STP
Layer 4
802.3ab and 802.3z

23. 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?
Duplex mismatch
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
VTP
TCP

24. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Certkiller B > trace
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
Source Port - Acknowledgment Number - and Window
Switches increase the number of collision domains in the network.

25. 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
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.
100 meters

26. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Congestion avoidance - Windowing and Buffering
Application
Network
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

27. Which three of the protocols below belong to the application layer? (Select three answer choices)
In an improperly implemented redundant topology
HTTPS - SMTP - and TFTP
Fiber optic cable.
Buffering - Cut-through - and Congestion avoidance

28. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3

29. 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?
Application
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Device Identifiers - Capabilities list - Platform
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.

30. 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?
To prevent switching loops in networks with redundant switched paths.
Network
To allow remote management of the switch.
CertK Switch(config)# ip default-gateway 192.168.1.115

31. 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
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.
The network layer
Data link

32. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
ARP and ICMP
Certkiller B > trace
The Bridgeg ID and The bridge priority
Layer 4

33. 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 used to prevent switching loops in networks with redundant switched routes.
Device Identifiers - Capabilities list - Platform
In an improperly implemented redundant topology
An additional broadcast domain will be created.

34. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Layer 4
Encapsulations PPP and authentication CHAP
Serial0/1 is down - line protocol is down
Configure the switch so that it has lower priority than other switches in the network

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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link
Decrease the window size.

36. 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 Bridgeg ID and The bridge priority
Sequence number - Window size - and Acknowledgment number
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.

37. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
ARP and ICMP

38. 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?
SMTP FTP and HTTP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.1Q and ISL
It is the sum of the costs based on bandwidth

39. 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)
SMTP FTP and HTTP
Switches increase the number of collision domains in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link

40. 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.
Increased latency and Filtering of all frame errors
This is an Ethernet port operating at half duplex
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

41. 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?
Switches increase the number of collision domains in the network.
Device Identifiers - Capabilities list - Platform
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.
Physical Layer and Datalink Layer

42. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Show arp and Show interface
Hosts use a logical bus topology
Auto - Desirable - and On
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

43. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
To prevent switching loops in networks with redundant switched paths.
To allow remote management of the switch.
In an improperly implemented redundant topology
Duplex mismatch

44. 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?
Device Identifiers - Capabilities list - Platform
802.1Q and ISL
Configure the switch so that it has lower priority than other switches in the network
Telnet and FTP

45. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Application
SMTP FTP and HTTP
Transport
Data link

46. 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
Increased latency and Filtering of all frame errors
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Auto - On - and Desirable
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

47. 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?

48. 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?
Encapsulations PPP and authentication CHAP
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.

49. Which of the following are types of flow control?
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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Learning - Listening - and Forwarding
Buffering - Cut-through - and Congestion avoidance

50. What is the purpose of the spanning-tree algorithm in a switched LAN?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Encapsulations PPP and authentication CHAP
To prevent switching loops in networks with redundant switched paths.
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.