Google IT Support Certificate

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Questions and Answers

What is eight bits of data called?

octet

There are ____ octets in an IP address.

Four

Under which IP header field would QoS details be found?

Service Type Field

Which IP address is Class C? Select one.

192.37.48.98 Signup and view all the answers

What does ARP stand for?

Address Resolution Protocol Signup and view all the answers

What does CIDR stand for?

Classless Inter-Domain Routing Signup and view all the answers

What is the third step in the transmission of a packet?

The router looks up the destination network in its routing table. Signup and view all the answers

Interior gateway protocols are used by routers in order to share information within a single...

Autonomous system Signup and view all the answers

What protocol communicates data between routers representing the edges of autonomous systems?

Exterior gateway Signup and view all the answers

Which of the following IP address ranges have been defined as non-routable address space? Select all that apply.

172.16.0.0/12 Signup and view all the answers

What address will stay the same regardless of the network a device is attached to?

MAC Address Signup and view all the answers

In a Class A address, the possible values for the first octet are:

0-127 Signup and view all the answers

What is the purpose of an ARP response?

To let a broadcasting node know what is the MAC address to put into the destination hardware address field. Signup and view all the answers

When describing blocks of IP addresses, what does CIDR do?

Uses subnet masks to demarcate networks. Signup and view all the answers

How many bits long is an Autonomous System Number (ASN)?

32 bits Signup and view all the answers

Ranges of IP addresses anyone can use for their internal networks are known as ______.

Non-routable address space Signup and view all the answers

Generally, what are Class E IP addresses used for?

Testing Signup and view all the answers

Why do entries in a local Address Resolution Protocol (ARP) table expire after a short amount of time?

To account for network changes. Signup and view all the answers

What organization helps manage IP address allocation and autonomous system number allocation?

IANA Signup and view all the answers

What does RFC stand for?

Request For Comments Signup and view all the answers

Study Notes

Network Layer Concepts

Eight bits of data are referred to as an octet.
An IP address consists of four octets.

Quality of Service (QoS)

QoS services allow routers to prioritize certain IP datagrams over others.
Relevant QoS details are found in the Service Type Field of the IP header.

IP Address Classes

A Class C IP address falls within the range of 192.37.48.98.
In a Class A address, the first octet can have a value between 0-127.

Address Resolution

ARP stands for Address Resolution Protocol, which translates IP addresses to MAC addresses.

Routing Protocols

CIDR stands for Classless Inter-Domain Routing, which uses subnet masks for network delineation.
Interior gateway protocols share routing information within a single autonomous system.
Routers use exterior gateway protocols to communicate data representing the edges of autonomous systems.

IP Address Space

Defined ranges of non-routable address space include 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.
The address that remains the same regardless of network attachment is the MAC Address.

Autonomous System Number (ASN)

An ASN is 32 bits in length, used for routing and IP address allocation.

Network Management

The IANA (Internet Assigned Numbers Authority) regulates IP address allocation and ASN allocation.
RFC stands for Request For Comments, which are documents for discussing internet protocols.

Miscellaneous

The ARP response informs broadcasting nodes of the MAC address necessary for the destination hardware address.
Entries in an ARP table expire shortly to accommodate network changes.
Class E IP addresses are generally reserved for testing purposes.

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Description

Test your knowledge on the network layer concepts from the Google IT Support Certificate. This quiz covers essential terms and principles related to octets, IP addresses, and QoS services. Perfect for learners aiming to master networking fundamentals.