Cisco 640-802 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 640-802
Exam Name/Title: Cisco Certified Network Associate(CCNA)
Certification Provider: Cisco
Corresponding Certification: CCNA

Exam Questions: 653
Updated On: May 27, 2026

Question #43

What is the principle reason to use a private IP address on an internal network?

A. Conserve public IP addresses so that we do not run out of them.

B. Manage and scale the growth of the internal network.

C. Allow access reserved to the devices.

D. Subnet strategy for private companies.

Discussion 0

Correct Answer: A Vote an answer

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Question #44

Which two commands correctly verify whether port security has been configured on port FastEthernet 0/12 on a switch? (Choose two)?

A. sw1#show running-config

B. sw1#show port-secure interface FastEthernet 0/12

C. sw1#show switchport port-secure interface FastEthernet 0/12

D. sw1#show switchport port-security interface FastEthernet 0/12

E. sw1#show port-security interface FastEthernet 0/12

Discussion 0

Correct Answer: A,E Vote an answer

Question #45

For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)

A. to establish a priority system to determine which device gets to transmit first

B. to uniquely identify devices at Layer 2

C. to allow detection of a remote device when its physical address is unknown

D. to allow communication between different devices on the same network

E. to allow communication with devices on a different network

F. to differentiate a Layer 2 frame from a Layer 3 packet

Discussion 0

Correct Answer: B,D Vote an answer

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Question #46

The network technician is planning to use the 255.255.255.224 subnet mask on the network. Which three valid IP addresses can the technician use for the hosts?
(Choose three.)

A. 172.22.243.127

B. 192.168.1.160

C. 10.17.64.34

D. 10.16.33.98

E. 172.22.243.191

F. 172.22.243.190

Discussion 0

Correct Answer: C,D,F Vote an answer

Question #47

What is the effect of using the service password-encryption command?

A. Only the enable secret password will be encrypted.

B. It will encrypt all current and future passwords.

C. Only the enable password will be encrypted.

D. It will encrypt the secret password and remove the enable secret password from the configuration.

E. Only passwords configured after the command has been entered will be encrypted.

Discussion 0

Correct Answer: B Vote an answer

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Question #48

What is the purpose of Spanning Tree Protocol?

A. to create a default route

B. to provide multiple gateways for hosts

C. to maintain a loop-free Layer 2 network topology

D. to prevent routing loops

Discussion 0

Correct Answer: C Vote an answer

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Question #49

Refer to the exhibit.

The network shown in the diagram is experiencing connectivity problems. Which of the following will correct the problems? (Choose two.)

A. Configure the IP address of Host A as 10.1.2.2.

B. Configure the masks on both hosts to be 255.255.255.224.

C. Configure the masks on both hosts to be 255.255.255.240.

D. Configure the IP address of Host B as 10.1.2.2.

E. Configure the gateway on Host B as 10.1.2.254.

F. Configure the gateway on Host A as 10.1.1.1.

Discussion 0

Correct Answer: D,E Vote an answer

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Question #50

Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?

A. Only the IP detected by Gratuitous ARP is removed from the pool.

B. The address remains in the pool until the conflict is resolved.

C. The IP will be shown, even after the conflict is resolved.

D. The address is removed from the pool until the conflict is resolved.

E. Only the IP detected by Ping is removed from the pool.

Discussion 0

Correct Answer: D Vote an answer

Question #51

Which two statements best describe the wireless security standard that is defined by WPA? (Choose two.)

A. It specifies the use of dynamic encryption keys that change each time a client establishes a connection.

B. It requires that all access points and wireless devices use the same encryption key.

C. It requires use of an open authentication method.

D. It specifies use of a static encryption key that must be changed frequently to enhance security.

E. It includes authentication by PSK.

Discussion 0

Correct Answer: A,E Vote an answer

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Question #52

Which command can you use to manually assign a static IPv6 address to a router interface?

A. ipv6 address 2001:db8:2222:7272::72/64

B. ipv6 autoconfig

C. ipv6 address PREFIX_1::1/64

D. ipv6 autoconfig 2001:db8:2222:7272::72/64

Discussion 0

Correct Answer: A Vote an answer

Question #53

DRAG DROP

Discussion 0

Correct Answer:

Explanation:

Question #54

The ip subnet zero command is not configured on a router. What would be the IP address of Ethernet 0/0 using the first available address from the sixth subnet of the network 192.168.8.0/29?

A. 192.168.8.25

B. 192.168.8.113

C. 192.168.8.41

D. 192.168.8.49

Discussion 0

Correct Answer: D Vote an answer

Question #55

Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?

A. Set the SSID value on the client to the SSID configured on the AP.

B. Configure open authentication on the AP and the client.

C. Configure MAC address filtering to permit the client to connect to the AP.

D. Set the SSID value in the client software to public.

Discussion 0

Correct Answer: A Vote an answer

Question #56

Refer to the following protocols, which one can create a secure terminal connection to a remote network device?

A. SSH

B. SNMPv1

C. Telnet

D. ARP

E. SNMPv2

F. wep

Discussion 0

Correct Answer: A Vote an answer

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