Networking Fundamentals Flashcards
Subnets
Range of IPs in VPC distinguished based on route table
Private Subnet
w/i subnet traffic in route table only
Public subnet
entry is route table to an IGW
VPN
entry in route table to a VPG
Route Tables
determines were traffic is directed
Internet Gateway
horizontally scaled redundant, available VPC that communicates b/t VPC and internet
How internet gateways work
provide target in VPC route table, then perform NAT for instances assigned public IPv4 addresses
NAT Gateways
enable private subnet instances to connect to internet w/o internet initiating a connection
Egress only internet gateways
allows outbound IPv6 communication only
internet can’t initiate a connection
Elastic IP addresses
static IP used for dynamic cloud computing
Elastic IP address Use Case
mask instance failures, remap EIP to a diff instance in VPC
move vNICs, associate EIP w/ NIC and move attributes from vNIC to new one
DHCP Options Sets
Assign corp domain to instances
DHCP Options Set Types
domain-name-servers
domain-name-ntp-servers
netbios-name-servers
netbios-node-type
Endpoints
vVPC devices
Gateway endpoints
target for a route in route table for traffic destined to a supported AWS service
