NE09 - IPv4 and Subnetting

What is the primary purpose of a subnet mask in an IPv4 network?

• To assign MAC addresses to devices

• To determine the default gateway

• To divide the IP address into network and host portions

• To encrypt IP traffic

Why is CIDR (Classless Inter-Domain Routing) preferred over classful addressing?

• It increases the number of available MAC addresses

• It simplifies DNS resolution

• It allows more flexible and efficient IP address allocation

• It eliminates the need for routers

Which protocol is responsible for dynamically assigning IP addresses to devices on a network?

• DNS

• ARP

• DHCP

• ICMP

In the context of DHCP, what does the acronym DORA stand for?

• Discover, Offer, Request, Acknowledge

• Deploy, Operate, Route, Assign

• Detect, Organize, Reassign, Apply

• Domain, Output, Relay, Address

Which of the following best describes a scenario where supernetting would be used?

• To isolate a single host from a network

• To combine multiple smaller networks into a larger one

• To assign static IPs to printers

• To configure VLANs on a switch

In binary, what is the decimal equivalent of the 8-bit value 11000000?

• 128

• 192

• 224

• 240

What does a default gateway do in a network?

• Encrypts traffic between devices

• Assigns IP addresses to hosts

• Routes traffic to external networks

• Resolves domain names to IPs

Which layer of the OSI model does IP addressing operate on?

• Layer 1 – Physical

• Layer 2 – Data Link

• Layer 3 – Network

• Layer 4 – Transport

Which of the following is a valid private IP address range?

• 172.32.0.0/12

• 192.168.0.0/16

• 11.0.0.0/8

• 224.0.0.0/4

Which DNS record type maps a domain name to an IPv4 address?

• MX

• CNAME

• A

• PTR