CompTIA A+ Core 1 Local Area Networking

What is the purpose of a Domain-based Message Authentication, Reporting and Conformance (DMARC)?

To avoid spoofing by entering a record of domains.

What does the acronym DNS stand for?

Domain Name System.

How do we organize packets in network communications?

By Protocol Data Units (PDU).

What is an A record in DNS?

An A record tracks IPv4 address systems names.

What does the User Datagram Protocol (UDP) do?

Sends data in a connectionless manner and can send multiple packets.

What is the function of DNS Root Servers?

Responsible for translating domain names into IP Addresses.

What is the main role of a Router?

To filter and forward traffic while connecting systems on a LAN.

What is meant by Cached Data?

A process that stores temporary copies of data or files.

What does DHCP stand for?

Dynamic Host Configuration Protocol.

What is a Virtual Local Area Network (VLAN)?

A logical segregation of users within a single broadcast domain.

What is User Datagram Protocol (UDP)?

A connectionless protocol that sends packets without establishing a connection.

What is the maximum character limit for a Fully Qualified Domain Name (FQDN)?

256 characters, including dots.

What is Latency in networking?

The delay in time that data takes to transfer across a network.

What does Quality of Service (QoS) manage?

It manages network traffic and prioritizes data packets.

What does the acronym ICMP represent?

Internet Control Message Protocol.

What is the purpose of Sender Policy Framework (SPF)?

An email authentication method that identifies mail servers allowed to send email for a domain.

What is the function of Access Control Lists (ACLs)?

To specify which users or systems are granted or denied access to network resources.

What does a Static IP Address refer to?

An IP address that remains the same over time.

How does a Dynamic IP Address differ from a Static IP Address?

A Dynamic IP Address is temporary and can change over time.

What generally causes Network Congestion?

When too much data is trying to travel through a network at once.

What are the main responsibilities of the Network Layer in the OSI model?

Determine the best route for data packets and manage logical addressing.

What is a Managed Switch?

A switch ideal for large networks with complex requirements, supporting advanced features.

What is the highest layer of the OSI model?

Application Layer.

What happens when a user reboots their router in terms of IP Address?

The dynamic IP address may change.

What is the role of TCP in the Transport Layer?

To ensure reliable data delivery and manage errors.