Google IT Support Professional:The Bits and Bytes of Computer Networking (Week 4) Networking Services.

 Don't just copy for the sake of completion. 

Make sure you understand first.

★Networking Services★

Q1.DNS stands for _________.

1. Do Not Signal
2. Domain Name System
3. Dynamic Name Server
4. Diversified Nomenclature System

DNS stands for Domain Name System.

Q2.A concept that involves iterating over a list of items one by one in an orderly fashion is known as _______.

1. round robin
2. recursion
3. authoritative lookup
4. multiplexing

Round robin ensures a fairly equal distribution across its members.

Q3.A _______ record is responsible for resolving an IP to a domain name.

1. CNAME
2. PTR
3. NTP
4. TXT

PTR records operate as the inverse of an A Record.

Q4.The final step of the DHCP Discovery process is known as ______.

1. DHCPACK
2. DHCPOFFER
3. DHCPDISCOVER
4. DHCPREQUEST

A DHCPACK is the final step in the DHCP Discovery process.

Q5.When NAT hides the source IP of an originating device, this is known as ________.

1. port forwarding
2. routing
3. switching
4. IP masquerading

IP masquerading means that the destination will never know the actual IP of the source.

Q6.At the very lowest level, what data does a computer understand?

1. IP (Internet Protocol) addresses
2. Hexadecimal digits
3. Media Access Control (MAC) addresses
4. Binary numbers

Binary numbers are zeros and ones. Fortunately, computers present data in a much friendlier way.

Q7.The "www" portion of a domain is known by which of the given options? Check all that apply.

1. Host name
2. Subdomain
3. Top Level Domain (TLD) name
4. Fully Qualified Domain Name (FQDN)

Q8.Which of the following allows computers on a network to automatically receive address assignment information?

1. Dynamic Host Protocol (DHCP)
2. Domain Name System (DNS)
3. Time to Live (TTL)
4. Primary gateway

DHCP is used to automatically assign IP addresses to devices on a network.

Q9.Network Address Translation (NAT) is typically implemented with which hardware devices? Check all that apply.

1. Hubs
2. Routers
3. Firewalls
4. Switches

Q10.An IT engineer is planning a website upgrade with load balancing features. What technology is used?

1. Reverse proxy
2. Round robin
3. Web proxy
4. Port forwarding

Q11.What port on a name server is used for User Datagram Protocol (UDP) name request packets?

1. 25
2. 80
3. 22
4. 53

DNS uses port 53 over UDP for name resolution communications.

Q12.A new Domain Name System (DNS) server is being configured. Which record type is used to declare a new zone?

1. Name server (NS)
2. Start of Authority (SOA)
3. Pointer (PTR)
4. Mail Exchanger (MX)

An SOA record establishes a zone and maintains authority over the zone.

Q13.Which of the following is NOT configured by a Dynamic Host Protocol (DHCP) server?

1. Internet Protocol (IP) address
2. Media Access Control (MAC) address
3. Subnet mask address
4. Gateway address

Q14.A Virtual Private Network (VPN) uses a particular layer from the OSI reference model to carry an encrypted payload that actually contains an entire second set of packets. Which layer is used?

1. Presentation
2. Network
3. Transport
4. Application 

Q15.What is the importance of using DNS?

1. Get connected
2. Name resolution
3. Assigning addresses
4. Securing a network

The Domain Name System (DNS) use records to resolve numeric addresses to friendly names.

Q16.During the name resolution process, which technique is used to avoid congestion when querying a server?

1. Redirect
2. Lookup
3. Anycast
4. Hierarchy

Anycast allows a request to be sent to an appropriate server based on factors, like location. This helps relieve severe congestion.

一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一

           Machine Learning Coursera-All weeks solutions [Assignment + Quiz] click here

       &

                         Coursera Google Data Analytics Professional Quiz Answers   click here

    &

                       Coursera Google IT Support Professional   click here

Have no concerns to ask doubts in the comment section. I will give my best to answer it.

If you find this helpful kindly comment and share the post.

This is the simplest way to encourage me to keep doing such work.

Thanks & Regards,

- Wolf