ccna 4 chapter 6 question and answer, cisco question and answer, cisco tutorial

CCNA 4 Chapter 6 Question and Answer

(Total 26 Question and Answer)

1. Which two protocols can be used to encapsulate traffic that is traversing a VPN tunnel? (Choose two.)

ATM

CHAP

IPsec

IPX

MPLS

PPTP 

2. What are the three main functions of a secure VPN? (Choose three.)

accounting

authentication

authorization

data availability

data confidentiality

data integrity

3. Data confidentiality through a VPN can be enhanced through the use of which three encryption protocols? (Choose three.)

AES

DES

AH

hash

MPLS

RSA

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ccna 4 chapter 5 question and answer, cisco question and answer, cisco tutorial

CCNA 4 Chapter 5 Question and Answer

(Total 26 Question and Answer)

1. The following commands were entered on a router: 
Router(config)# access-list 2 deny 172.16.5.24 
Router(config)# access-list 2 permit any 
The ACL is correctly applied to an interface. What can be concluded about this set of commands?

The wildcard mask 0.0.0.0 is assumed.

The access list statements are misconfigured.

All nodes on the 172.16.0.0 network will be denied access to other networks.

No traffic will be allowed to access any nodes or services on the 172.16.0.0 network. 

2. Interface s0/0/0 already has an IP ACL applied inbound. What happens when the network administrator attempts to apply a second inbound IP ACL?

The second ACL is applied to the interface, replacing the first.

Both ACLs are applied to the interface.

The network administrator receives an error.

Only the first ACL remains applied to the interface.

3. Which two statements are correct about extended ACLs? (Choose two)

Extended ACLs use a number range from 1-99.

Extended ACLs end with an implicit permit statement.

Extended ACLs evaluate the source and destination addresses.

Port numbers can be used to add greater definition to an ACL.

Multiple ACLs can be placed on the same interface as long as they are in the same direction.

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ccna 4 chapter 4 question and answer, cisco question and answer, cisco tutorial

CCNA 4 Chapter 4 Question and Answer

(Total 23 Question and Answer)

1. Which two statements are true regarding network security? (Choose two.)

Securing a network against internal threats is a lower priority because company employees represent a low security risk.

Both experienced hackers who are capable of writing their own exploit code and inexperienced individuals who download exploits from the Internet pose a serious threat to network security.

Assuming a company locates its web server outside the firewall and has adequate backups of the web server, no further security measures are needed to protect the web server because no harm can come from it being hacked.

Established network operating systems like UNIX and network protocols like TCP/IP can be used with their default settings because they have no inherent security weaknesses.

Protecting network devices from physical damage caused by water or electricity is a necessary part of the security policy.

2. Which two statements are true about network attacks? (Choose two.)

Strong network passwords mitigate most DoS attacks.

Worms require human interaction to spread, viruses do not.

Reconnaissance attacks are always electronic in nature, such as ping sweeps or port scans.

A brute-force attack searches to try every possible password from a combination of characters.

Devices in the DMZ should not be fully trusted by internal devices, and communication between the DMZ and internal devices should be authenticated to prevent attacks such as port redirection.

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ccna 4 chapter 3 question and answer, cisco question and answer, cisco tutorial

CCNA 4 Chapter 3 Question and Answer

(Total 23 Question and Answer)

1. Which three actions might a Frame Relay switch perform when it detects an excessive build-up of frames in its queue? (Choose three.)

puts a hold on accepting frames in excess of the CIR

drops frames from the queue that have the DE bit set

reduces the number of frames it sends over the link

re-negotiates flow control with the connected device

sets the FECN bit on all frames it receives on the congested link

sets the BECN bit on all frames it places on the congested link

2. Which best describes the benefit of using Frame Relay as opposed to a leased line or ISDN service?

Customers can define their virtual circuit needs in far greater combinations, with increments as small as 64 kbps.

Customers pay for an end-to-end connection that includes the local loop and the network link.

Customers only pay for the local loop and the bandwidth they purchase from the network provider.

Connecting new sites requires new lower cost circuit installations when compared to ISDN dialup costs or adding additional hardware for leased service.

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