Home networking
Unicast and multicast: IPTV does not identify the delivery method by itself
Unicast sends traffic toward an individual destination, while IP multicast uses group delivery under its network mechanisms.
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Home networking
IGMP snooping and IGMP proxying are different network functions
IGMP snooping and IGMP proxying are related to multicast but perform different jobs.
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VLAN, Wi-Fi name and IP subnet: related design choices, different things
A Wi-Fi name identifies a wireless network label, a VLAN can provide logical separation at the link layer, and an IP subnet defines an addressing boundary.
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NAT64: reaching IPv4 services from an IPv6-oriented network
NAT64 provides a translation mechanism for applicable communication between IPv6 clients and IPv4 servers.
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DNS can use TCP: a working small lookup does not test every response path
DNS is not limited to one transport.
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Network time synchronization keeps the device clock distinct from media timing
Network time synchronization helps maintain a device's clock.
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DNS over TLS and DNS over HTTPS: different encrypted resolver paths
DNS over TLS and DNS over HTTPS protect DNS exchanges through different standardized transport arrangements.
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ETag and Last-Modified: two ways to validate a stored response
ETag and Last-Modified can help a client validate a stored HTTP representation.
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CIDR notation: the prefix explains the address range
CIDR notation combines an IP address with a prefix length, such as /24 in an IPv4 example.
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ARP and DNS answer different address questions
ARP helps resolve IPv4 protocol addresses to local-link hardware addressing in applicable networks.
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