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NEW QUESTION # 71
During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?
Answer: B
Explanation:
The Data Link layer adds the MAC address header and a trailer containing the frame check sequence for error detection.
NEW QUESTION # 72
Which information is included in the header of a UDP segment?
Answer: B
Explanation:
The header of a UDP (User Datagram Protocol) segment includes port numbers. Specifically, it contains the source port number and the destination port number, which are used to identify the sending and receiving applications. UDP headers do not include IP addresses or MAC addresses, as those are part of the IP and Ethernet frame headers, respectively. Additionally, UDP does not use sequence numbers, which are a feature of TCP (Transmission Control Protocol) for ensuring reliable delivery of data segments1.
Reference: =
Segmentation Explained with TCP and UDP Header
User Datagram Protocol (UDP) - GeeksforGeeks
Which three fields are used in a UDP segment header
UDP Header: The header of a UDP segment includes the following key fields:
Source Port: The port number of the sending application.
Destination Port: The port number of the receiving application.
Length: The length of the UDP header and data.
Checksum: Used for error-checking the header and data.
IP Addresses: These are included in the IP header, not the UDP header.
Sequence Numbers: These are part of the TCP header, not UDP.
MAC Addresses: These are part of the Ethernet frame header and are not included in the UDP header.
Reference: RFC 768 - User Datagram Protocol: RFC 768
Cisco Guide on UDP: Cisco UDP Guide
NEW QUESTION # 73
Evaluate the graphic.
While making a configuration change to Router1, a junior technician accidentally reboots the router.
Which two statements are true about the impact to communication on the network while the router is temporarily offline? (Choose two.)
Answer: B,D
Explanation:
Communication between different VLANs requires Router1, so without the router, no PC can reach the file server in VLAN 10. Devices in the same VLAN can still communicate at Layer 2 through the switch, so PC-A and PC-B can still communicate with each other.
NEW QUESTION # 74
DRAG DROP
Move the MFA factors from the list on the left to their correct examples on the right. You may use each factor once, more than once, or not at all.
Note: You will receive partial credit for each correct selection.
Answer:
Explanation:
Explanation:
The correct matching of the MFA factors to their examples is as follows:
Entering a one-time security code sent to your device after logging in: Possession
Holding your phone to your face to be recognized: Inherence
Specifying your user name and password to log on to a service: Knowledge
Here's why each factor matches the example:
Possession: This factor is something the user has, like a mobile device. A one-time security code sent to this device falls under this category.
Inherence: This factor is something the user is, such as a biometric characteristic. Facial recognition using a phone is an example of this factor.
Knowledge: This factor is something the user knows, like a password or PIN.
Multi-Factor Authentication (MFA) enhances security by requiring two or more of these factors to verify a user's identity before granting access.
Entering a one-time security code sent to your device after logging in.
Factor: Possession
This factor relates to something you have, such as a device that receives a security code.
Holding your phone to your face to be recognized.
Factor: Inference (typically referred to as Inherence or Biometric)
This factor relates to something you are, such as biometric authentication like facial recognition.
Specifying your username and password to log on to a service.
Factor: Knowledge
This factor relates to something you know, such as a username and password.
Possession Factor: This involves something the user has in their possession. Receiving a one-time security code on a device (e.g., phone) is an example of this.
Inference Factor (Inherence/Biometric): This involves something inherent to the user, such as
biometric verification (e.g., facial recognition or fingerprint scanning).
Knowledge Factor: This involves something the user knows, such as login credentials (username and password).
Reference: Multi-Factor Authentication (MFA) Explained: MFA Guide
Understanding Authentication Factors: Authentication Factors
NEW QUESTION # 75
During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?
Answer: B
NEW QUESTION # 76
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