Cloud

Question 1

What is Network Function Virtualization (NFV)?

Answer 1

The replacing of physical network devices with a logical/virtual counterpart. E.g. replacing a physical switch with a virtual one.

They perform the same function as the hardware device would do and are managed from the hypervisor.

Lots of deployment options: virtual machine, container, fault tolerance redundancy backups.

Question 2

What is a Virtual Private Cloud (VPC)?

Answer 2

A group of resources/virtual versions of network devices created in a public cloud.

You can connect multiple VPC’s (groups of virtualised network devices) together via a TRANSIT GATEWAY/cloud router.

Question 3

What does a VPC NAT gateway do?

Answer 3

Allow you’re VPC (Virtual Private Cloud resources/virtual infrastructure) to connect to the WAN/Internet by NAT - Network Address Translation. - converts the private IP address to a public IP address.

Question 4

What is a Network security list?

Answer 4

A security rule that is assigned to an entire IP subnet.

-Lacks granular control.

Question 5

What is a network security group?

Answer 5

Assignment of a security rule to a specific VNIC (Virtual Network Interface Card)

Question 6

What is a security rule?

Answer 6

Allows or blocks traffic based on its attributes e.g. port number, source IP etc.