CCNA4 Final 2

Which two types of devices are specific to WAN environments and are not found on a LAN? (Choose two.)

Access layer switch

Broadband modem

Core switch

CSU/DSU

What is a feature of dense wavelength-division multiplexing (DWDM) technology?

It replaces SONET and SDH technologies.

It enables bidirectional communications over one strand of fiber.

It provides Layer 3 support for long distance data communications.

It provides a 10 Gb/s multiplexed signal over analog copper telephone lines.

What is a disadvantage of ATM compared to Frame Relay?

Less efficient

Lacks SVC support

Does not scale well to provide high speed WAN connections

Requires multiple interfaces on the edge router to support multiple VCs

An intercity bus company wants to offer constant Internet connectivity to the users traveling on the buses. Which two types of WAN infrastructure would meet the requirements? (Choose two.)

What device is needed at a central office to aggregate many digital subscriber lines from customers?

CMTS

DSLAM

CSU/DSU

Access server

A corporation is searching for an easy and low cost solution to provide teleworkers with a secure connection to headquarters. Which solution should be selected?

Dial-up connection

Leased line connection

Site-to-site VPN over the Internet

Remote access VPN over the Internet

Refer to the exhibit. What type of Layer 2 encapsulation will be used for RtrA connection D if it is left to the default and the router is a Cisco router?

Ethernet

Frame Relay

HDLC

PPP

Which two functions are provided by the NCP during a PPP connection? (Choose two.)

Identifying fault conditions for the PPP link

Providing multilink capabilities over the PPP link

Bringing the network layer protocol or protocols up and down

Enhancing security by providing callback over PPP

Negotiating options for the IP protocol

Managing authentication of the peer routers of the PPP link

What PPP information will be displayed if a network engineer issues the show ppp multilink command on Cisco router?

The link LCP and NCP status

The queuing type on the link

The IP addresses of the link interfaces

The serial interfaces participating in the multilink

Refer to the exhibit. Which statement describes the status of the PPP connection?

Only the link-establishment phase completed successfully.

Only the network-layer phase completed successfully.

Neither the link-establishment phase nor the network-layer phase completed successfully.

Both the link-establishment and network-layer phase completed successfully.

A network administrator is configuring a PPP link with the commands:

R1(config-if)# encapsulation ppp

R1(config-if)# ppp quality 70

What is the effect of these commands?

The PPP link will be closed down if the link quality drops below 70 percent.

The NCP will send a message to the sending device if the link usage reaches 70 percent.

The LCP establishment phase will not start until the bandwidth reaches 70 percent or more.

The PPP link will not be established if more than 30 percent of options cannot be accepted.

How does virtualization help with disaster recovery within a data center?

Power is always provided.

Less energy is consumed.

Server provisioning is faster.

Hardware does not have to be identical.

Which broadband solution is appropriate for a home user who needs a wired connection not limited by distance?

Cable

DSL

WiMax

ADSL

In software defined network architecture, what function is removed from network devices and performed by an SDN controller?

Control plane

Data plane

Security

Application policies

What would a network administrator expect the routing table of stub router R1 to look like if connectivity to the ISP was established via a PPPoE configuration?

192.168.1.0/32 is subnetted, 2 subnetted C 192.168.1.1 is directly connected, Dialer1 C 192.168.1.2 is directly connected, Dialer2

S* 0.0.0.0/0 is directly connected, Dialer1

192.168.1.0/32 is subnetted, 2 subnetted C 192.168.1.1 is directly connected, Dialer

S* 0.0.0.0/0 is directly connected, Dialer1 192.168.1.0/32 is subnetted, 2 subnetted C 192.168.1.1 is directly connected, Dialer1 C 192.168.1.2 is directly connected, Dialer1

What is a benefit of implementing a Dynamic Multipoint VPN network design?

A DMVPN will use an encrypted session and does not require IPsec.

A DMVPN uses a Layer 3 protocol, NHRP, to dynamically establish tunnels.

A DMVPN will support remote peers by providing a mapping database of public IP addresses to each one.

A DMVPN uses mGRE to create multiple GRE interfaces that each support a single VPN tunnel.

Which remote access implementation scenario will support the use of generic routing encapsulation tunneling?

A mobile user who connects to a router at a central site

A branch office that connects securely to a central site

A mobile user who connects to a SOHO site

A central site that connects to a SOHO site without encryption

Refer to the exhibit. All routers are successfully running the BGP routing protocol. How many routers must use EBGP in order to share routing information across the autonomous systems?

Which three values or sets of values are included when creating an extended access control list entry? (Choose three.)

Access list number between 1 and 99

Access list number between 100 and 199

Default gateway address and wildcard mask

Destination address and wildcard mask

Source address and wildcard mask

Source subnet mask and wildcard mask

Destination subnet mask and wildcard mask

Refer to the exhibit. A router has an existing ACL that permits all traffic from the 172.16.0.0 network. The administrator attempts to add a new ACE to the ACL that denies packets from host 172.16.0.1 and receives the error message that is shown in the exhibit. What action can the administrator take to block packets from host 172.16.0.1 while still permitting all other traffic from the 172.16.0.0 network?

Manually add the new deny ACE with a sequence number of 5.

Manually add the new deny ACE with a sequence number of 15.

Create a second access list denying the host and apply it to the same interface.

Add a deny any any ACE to access-list 1.

Which three implicit access control entries are automatically added to the end of an IPv6 ACL? (Choose three.)

The computers used by the network administrators for a school are on the 10.7.0.0/27 network. Which two commands are needed at a minimum to apply an ACL that will ensure that only devices that are used by the network administrators will be allowed Telnet access to the routers? (Choose two.)

A network administrator is adding ACLs to a new IPv6 multirouter environment. Which IPv6 ACE is automatically added implicitly at the end of an ACL so that two adjacent routers can discover each other?

Permit ip any any

Permit ip any host ip_address

Permit icmp any any nd-na

Deny ip any any

What would be the primary reason an attacker would launch a MAC address overflow attack?

So that the switch stops forwarding traffic

So that legitimate hosts cannot obtain a MAC address

So that the attacker can see frames that are destined for other hosts

So that the attacker can execute arbitrary code on the switch

What are three of the six core components in the Cisco IoT system? (Choose three.)

What security countermeasure is effective for preventing CAM table overflow attacks?

Port security

DHCP snooping

IP source guard

Dynamic ARP Inspection

Which SNMP feature provides a solution to the main disadvantage of SNMP polling?

SNMP set messages

SNMP trap messages

SNMP get messages

SNMP community strings

When SNMPv1 or SNMPv2 is being used, which feature provides secure access to MIB objects?

What two are added in SNMPv3 to address the weaknesses of previous versions of SNMP? (Choose two.)

Which field is used to mark Layer 2 Ethernet frames for QoS treatment?

Type of Service field

Traffic Class field

Priority field

Version field

Which statement describes a characteristic of standard IPv4 ACLs?

They are configured in the interface configuration mode.

They filter traffic based on source IP addresses only.

They can be created with a number but not with a name.

They can be configured to filter traffic based on both source IP addresses and source ports.

What is an example of cloud computing?

A continuous interaction between people, processes, data, and things

A service that offers on-demand access to shared resources

A network infrastructure that spans a large geographic area

An architectural style of the World Wide Web

Which type of resources are required for a Type 1 hypervisor?

A host operating system

A server running VMware Fusion

A management console

A dedicated VLAN

A network technician made a configuration change on the core router in order to solve a problem. However, the problem is not solved. Which step should the technician take next?

Gather symptoms.

Isolate the problem.

Restore the previous configuration.

Implement the next possible corrective action.

A user reports that when the corporate web page URL is entered on a web browser, an error message indicates that the page cannot be displayed. The help-desk technician asks the user to enter the IP address of the web server to see if the page can be displayed. Which troubleshooting method is being used by the technician?

Top-down

Bottom-up

Substitution

Divide-and-conquer

What is a primary function of the Cisco IOS IP Service Level Agreements feature?

To detect potential network attacks

To provide network connectivity for customers

To adjust network device configurations to avoid congestion

To measure network performance and discover a network failure as early as possible

Which symptom is an example of network issues at the network layer?

A misconfigured firewall blocks traffic to a file server.

There are too many invalid frames transmitted in the network.

Neighbor adjacency is formed with some routers, but not all routers.

A web server cannot be reached by its domain name, but can be reached via its IP address.

Refer to the exhibit. H1 can only ping H2, H3, and the Fa0/0 interface of router R1. H2 and H3 can ping H4 and H5. Why might H1 not be able to successfully ping H4 and H5?

Router R1 does not have a route to the destination network.

Switch S1 does not have an IP address configured.

The link between router R1 and switch S2 has failed.

Host H1 does not have a default gateway configured.

Hosts H4 and H5 are members of a different VLAN than host H1.

Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)

There is connectivity between this device and the device at 192.168.100.1.

The connectivity between these two hosts allows for videoconferencing calls.

There are 4 hops between this device and the device at 192.168.100.1.

The average transmission time between the two hosts is 2 milliseconds.

This host does not have a default gateway configured.

Match the characteristic to the appropriate authentication protocol.


Uses two-way handshake
Uses three-way handshake
Repeated challenges
Single challenge
Strong authentication
Weak authentication
Clear text passwords
Encrypted passwords
Uses a one-way handshake

What is a primary difference between a company LAN and the WAN services that it uses?

The company must subscribe to an external WAN service provider.

The company has direct control over its WAN links but not over its LAN.

Each LAN has a specified demarcation point to clearly separate access layer and distribution layer equipment.

The LAN may use a number of different network access layer standards whereas the WAN will use only one standard.

	Bandwidth	Delay	Congestion	Jitter
Measured in the number of bits that can be sent in a single second
The time it takes for a message to travel from the source to the destination
An interface that is presented with more traffic than it can handle
The variation in the latency between each received packet
Packets that are buffered and played out in a steady stream

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CCNA4 Final 2

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