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Sabtu, 12 Maret 2011

final ccna2_form1a-ver.4.1

How many host addresses may be assigned on each subnetwork when using the network address with a subnet mask of

In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?
*destination network address
source network address
source MAC address
well known port destination address

A company is developing an Internet store for its website. Which protocol should be used to transfer credit card information from customers to the company web server?

How do port filtering and access lists help provide network security?
*They prevent specified types of traffic from reaching specified network destinations.
They alert network administrators to various type of denial of service attacks as they occur.
They prevent viruses, worms, and Trojans from infecting host computers and servers.
They enable encryption and authentication of confidential data communications.

A user reports being unable to access the Internet. The help desk technician employs a bottom-up approach to troubleshooting. The technician first has the user check the patch cable connection from the PC to the wall, and then has the user verify that the NIC has a green link light. What will the technician have the user do next?
Enter an IP address into the WWW browser address bar to see if DNS is at fault.
Use traceroute to identify the device along the path to the ISP that may be at fault.
*Verify the IP address, subnet, and gateway settings using ipconfig on the PC.
Connect to the user home router to check firewall settings for blocked TCP ports.

Refer to the exhibit. Which combination of cables and symbols is correct?
A - crossover, B - straight-through, C - straight-through
A - crossover, B - rollover, C - straight-through
*A - straight-through, B -crossover, C - straight-through
A - straight-through, B -straight-through, C - straight-through
A - straight-through, B - straight-through, C - crossover
A - rollover, B - straight-through, C - straight-through

Refer to the exhibit. Which command would an administrator use to configure the router name?
Router# ip hostname Boise
Router# hostname Boise
Router(config-line)# name Boise
*Router(config)# hostname Boise
Router> ip hostname Boise

How does a switch interface that uses sticky port security handle MAC addresses?
The addresses are configured manually and are saved in the running configuration.
They are configured manually and are not saved in the running configuration.
*They are configured dynamically and are saved in the running configuration.
They are configured dynamically and are not saved in the running configuration.

Which statement describes a feature of TCP?
It provides low overhead data delivery.
*It acknowledges the receipt of packets.
It does not provide error checking.
It is a connectionless protocol.

Which cable type is used to interconnect the FastEthernet interfaces of two routers?

Which routing protocol facilitates the exchange of routing information between different autonomous systems?

Which statement is true about the reverse lookup DNS zone?
It is most commonly experienced when users are surfing the Internet.
It is the backup for the forward lookup zone.
It dynamically updates the resource records.
*It resolves an IP address to a fully qualified domain name.

Which statement correctly describes the function of AAA?
*It prevents unauthorized access to a network.
It filters traffic based on destination IP and port number.
It enables users to send information to a daemon that is running on a management station.
It encrypts data to provide network security.

Which two services are required to enable a computer to receive dynamic IP addresses and access the Internet using domain names? (Choose two.)

A network administrator wants to configure six subnets for a Class C network. Which subnet mask will support the maximum number of hosts on each subnet?

A building has experienced a power outage. When the power returns, none of the devices on one floor can access the Internet. The network administrator checks the switch in the IDF that these devices are connected to and notes that the SYST LED on the front of the switch is amber.
What is a possible cause of this problem?
The switch is functioning properly.
*The switch has failed POST.
The switch configuration file was not saved to NVRAM.
The connection between the switch and the server did not autonegotiate speed and duplex properly.

What is the effect of issuing the banner login #Unauthorized login prohibited# command on a router?
*It will display the message "Unauthorized login prohibited" before the router prompts for a user name.
It replaces the banner motd command.
It causes the router to prompt for login credentials for any user who is attempting to connect to the router.
It causes the message "Unauthorized access prohibited" to display when a HyperTerminal connection is idle.

Which statement correctly describes MIB?
It is software that is installed on a device which in turn is managed by SNMP.
It is installed on a system that is used to monitor networking devices.
*It is a database that a device keeps about itself concerning network performance parameters.
It is a communication protocol that is used between the management station and the management agent.

Which type of WAN connection uses a circuit-switched network?
Frame Relay

Refer to the exhibit. Which three IP addresses could be assigned to the hosts? (Choose three.)

A network engineer is asked to specify the type of cable for a new network installation. The engineer plans horizontal cable runs of less than 90 feet (27.4 meters) using cable that is not expensive and is easy to implement. It will be positioned away from electrically noisy areas to avoid EMI. Which cable should the engineer choose?
fiber optic

For the assignment of permissions to files and folders, what does the "principle of least privilege" imply?
No user has more privileges than any other user.
Permissions to files are given based on seniority.
*Users only have access to resources that are necessary for their jobs.
Users should be given no access to computer resources until they ask.

Which application can be delivered using UDP?

Which technology is used for WAN connections and delivers up to 1.544 Mb/s of symmetrical bandwidth?
*T1 line
T3 line

Which WAN service provides point-to-point connections with a predefined communications path?
*leased line

What is the primary function of a Level 1 support technician in an ISP help desk department with multiple levels of customer support?
to install hardware replacements for the customer
to accompany an on-site technician to provide additional technical support
*to diagnose and document the symptoms of hardware, software, and system problems
to design network enhancements that support the new technology requirements of the customer

A user calls a help desk about being unable to connect to a web server. The technician asks the user to issue a ping command. What is the purpose of this command?
verify if the network cable is connected to the PC
*verify if the TCP/IP stack is functioning on the PC
verify if the IP address is configured correctly on the PC
verify if the DNS server IP addresses are present on the PC

A small company is contracting with an ISP to host a web server. The web administrator needs to upload files to the web server via a secure channel using FTPS. Although a ping to the server is successful, the web administrator reports that the FTPS connection cannot be established. The technician at the ISP responds that for security reasons the FTPS default port has been blocked by a firewall and the web server has been configured with a non-default port for FTPS access. At which layer of the OSI model has the security measure been applied?
session layer
network layer
*transport layer
application layer

When a field technician visits a customer site and resolves the issue that was opened in a trouble ticket, what should the technician do?
assess the network design of the customer site
survey users at the customer site for further needs
*document the solution and obtain acceptance of the customer
discuss further problems that are identified during the visit and offer cost estimates

Refer to the exhibit. Static routes have been configured on all routers in the network. PC2 can communicate with PC1 but not with PC3. What should be done to remedy the problem?
Reconfigure the first static route with the exit interface S0/0/0.
*Reconfigure the second static route with the exit interface S0/0/1.
Reconfigure the first static route with the next hop address
Reconfigure the second static route with the next hop address

While configuring PAT on a Cisco ISR, a network technician defines the IP address of the router interface that connects to the ISP. This address will be the translated address for all Internet traffic from inside hosts. What is this IP address called?
inside local address
*inside global address
outside local address
outside global address

Refer to the exhibit. Which two routes when either is configured on R1 would allow traffic to be forwarded from hosts on network to network (Choose two.)
R1(config)# ip route S0/0/1
*R1(config)# ip route
R1(config)# ip route Fa0/0
*R1(config)# ip route S0/0/0
R1(config)# ip route

In the URL, what is identified by wwwdocs?
the server name where the resource is located
the protocol that is used for the resource request
the domain name of the server that is being accessed
*the folder where the requested resource is stored

Refer to the exhibit. A technician uses the SDM application to configure router R1. Which step should be taken by the technician to enable the Fa0/0 interface on R1 to participate on the connected local network?
Enable a DHCP server on the Fa0/0 LAN interface.
*Configure the appropriate IP address on the Fa0/0 interface.
Configure IP addresses for the primary and secondary DNS server.
Configure the starting and ending IP addresses for the DHCP pool but exclude the Fa0/0 IP address.

Refer to the exhibit. What effect will the commands have when entered on R2?
The cisco1 file will be copied to NVRAM.
The commands will not work because a password has not been set on the TFTP server.
The running configuration will be copied from R2 to the TFTP server.
*The cisco1 file will be copied from the TFTP server to the running configuration of R2.

What is the primary function of the NOC at a large ISP?
installing equipment at a customer site
setting up customer accounts and passwords
*monitoring and testing customer network connections
entering customer requirements in an order-tracking database

What is the maximum unrepeated distance set by industry standards for UTP cable?
10 meters
75 meters
*100 meters
325 meters

Refer to the exhibit. A network administrator has an extra router and wishes to use it as shown to passively monitor network traffic. Which IOS feature should be implemented on router EXTRA?

Refer to the exhibit. Hosts that belong to the IT department use as a default gateway. Where can this IP address be located in the network?

How do Tier 3 ISPs connect to the global Internet?
They connect to the global Internet through Tier 2 ISPs.
They extend across several countries but use the services of a Tier 1 ISP.
They use the services of both Tier 1 and Tier 2 ISPs in order to connect to the global Internet.
*They make up the global backbone of the Internet by physically joining their network with other Tier 3 ISPs.

What is a characteristic of a scalable network?
100% uptime
redundant links
*easy expansion
multiple backup devices

A Cisco switch is installed into a network and two module slots are purposefully left empty. Which network design consideration does this address?

A company functions from Monday to Friday each week. Their backup strategy calls for full backups each Friday night, with differential backups on all other weekday nights. If an administrator is asked to restore a server hard drive to its Wednesday morning state, how many backups must be used?

Refer to the exhibit. What could be two possible causes for the Serial0/0/0 interface status? (Choose two.)
A Layer 3 issue exists.
The bandwidth is set too high.
*An incorrect cable is being used.
A loopback address must be set.
The reliability setting is too low for the interface.
*A defective serial interface cable was used.

A network designer must specify cable for a 190 meter (625 foot) backbone link where EMI may be an issue. What type of cable should the designer choose?
shielded twisted pair
unshielded twisted pair

Refer to the exhibit. When the IOS image of a router must be backed up, what are three reasons to issue the exhibited commands? (Choose three.)
to confirm that the IOS image was copied completely
to determine the number of hops to the TFTP server
*to copy the IOS image file to the TFTP server
to set the destination directory on the TFTP server
*to confirm connectivity to the TFTP server
*to view the IOS image name and file size
to confirm that flash has enough space to store the IOS image file

When would TFTP in ROM monitor mode be used to restore a Cisco IOS image to a router?
when a console connection is the only available connection to the router
when the TFTP server software is incompatible with the router IOS version
*when the router is set to boot from flash, but the Cisco IOS image in flash is corrupt or has been erased
when the current Cisco IOS on the router requires a feature upgrade

What will a router do with a packet that is destined for a host with the IP address if no entry for the network exists in the routing table?
*It will drop the packet.
It will send the packet back to the source address.
It will broadcast the packet out all of its active interfaces.
It will broadcast the packet out all of its active interfaces except the interface that received the packet.

If the NVRAM on a router were to fail, which router resource would be lost?
IOS software image
ROMmon software
running configuration
*startup configuration

In designing a cabling upgrade plan, what is the first best practice that should be implemented?
Suggest the location of the MDF and IDF.
Choose the appropriate wiring.
Choose the new equipment to purchase.
*Examine the floor plan and the condition of existing wiring.
Decide upon the cable management system.

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