IPv4 Quiz: Test Your Knowledge of IP Addresses

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Questions and Answers

What is the primary function of a DNS server on an IP network?

Converting IP addresses to names

Routing data packets

Filtering network traffic

Translating names to IP addresses (correct)

How would you determine the IP network address of a machine given its IPv4 address and subnet mask?

Perform a reverse DNS lookup

Use the ARP protocol

Use the OSI model

Combine the IPv4 address with the subnet mask using bitwise AND operation (correct)

In CIDR notation, what is the equivalent CIDR value for the subnet mask 255.255.240.0?

/16

/24

/20 (correct)

/28

If the Network layer settings suggest that the source and destination computers are on different networks, what MAC address does the Data Link use as the source and destination of the transmission?

The MAC address of the router interface for both source and destination Signup and view all the answers

Why does each networked computer require an IP address?

To determine if the source and destination are on the same or different networks Signup and view all the answers

What constitutes an IPv4 address and how is it normally represented?

32 bits, represented as decimal numbers (e.g., 141.132.196.26) Signup and view all the answers

What is the main role of a DHCP server?

To allocate IP settings to the machine Signup and view all the answers

What does 'lease time' refer to in the context of DHCP servers?

The period for which an IP address is leased to a device Signup and view all the answers

What are the three mandatory IP settings a machine needs to access remote web sites?

Default Gateway, subnet mask, lease time Signup and view all the answers

What are the first IP addresses of the three Private IP address ranges?

10.0.0.0, 172.16.0.0, 192.168.0.0 Signup and view all the answers

How do two machines on a Private network use the one public address to communicate with Internet hosts?

They use NAT (Network Address Translation) to map private IP addresses to the public IP address. Signup and view all the answers

What is the role of a Network router?

To move network packets forward towards their destination. Signup and view all the answers

What does the interface entry in the routing table contain?

IP address and network address of the router interface Signup and view all the answers

What does the Next Hop entry in the routing table contain?

IP address of the next hop router Signup and view all the answers

Why are routing protocols required?

To enable routers to dynamically learn and communicate network routes. Signup and view all the answers

Which fields are present in an IP header?

Source IP address, Source MAC address, Time to Live field Signup and view all the answers

How many binary bits constitute an IPv6 address?

128 bits Signup and view all the answers

If your local DNS server cannot resolve an IP address query locally, how does it proceed to fulfill the request?

It contacts the root DNS server directly. Signup and view all the answers

How many IP addresses are there in Federation Universities IP address range?

256 Signup and view all the answers

Study Notes

DNS and IP Addresses

The primary function of a DNS server is to resolve domain names to IP addresses.
An IP network address can be determined by performing a logical AND operation on the IPv4 address and subnet mask.

CIDR Notation

The equivalent CIDR value for the subnet mask 255.255.240.0 is /20.

Data Link Layer

When the Network layer settings indicate that the source and destination computers are on different networks, the Data Link layer uses the MAC address of the default gateway as the destination MAC address and the MAC address of the source computer as the source MAC address.

IP Addresses

Each networked computer requires an IP address to communicate with other devices on a network.
An IPv4 address is a 32-bit address represented in dotted decimal notation, consisting of four numbers separated by dots (e.g., 192.0.2.1).
The three mandatory IP settings required to access remote web sites are:
- IP address
- Subnet mask
- Default gateway

Private IP Addresses

The first IP addresses of the three Private IP address ranges are:
- 10.0.0.0 (RFC 1918)
- 172.16.0.0 (RFC 1918)
- 192.168.0.0 (RFC 1918)
Machines on a Private network use NAT (Network Address Translation) to communicate with Internet hosts, where one public address is used to represent multiple private addresses.

Routers

The role of a Network router is to forward packets between networks.
The interface entry in the routing table contains the interface through which the packet will be forwarded.
The Next Hop entry in the routing table contains the IP address of the next router to which the packet will be forwarded.

Routing Protocols

Routing protocols are required to dynamically update routing tables and ensure efficient routing of packets.

IP Header

The IP header contains fields such as:
- Version
- Header length
- Service type
- Total length
- Identification
- Flags
- Fragment offset
- Time to live
- Protocol
- Header checksum
- Source IP address
- Destination IP address

IPv6

An IPv6 address is 128 bits long, represented in hexadecimal notation, and separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).

DNS Resolution

If a local DNS server cannot resolve an IP address query locally, it sends the request to a recursive DNS server or a DNS forwarder to fulfill the request.

IP Address Ranges

The Federation Universities IP address range is not specified, but it is likely a custom range assigned to the organization.

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Description

Test your knowledge about IP addresses and IPv4 with this quiz. Explore concepts such as the necessity of IP addresses for networked computers, the structure and representation of IPv4 addresses, and the significance of octets in networking.