WWDC 2017

Table of Contents

Advance in Networking, Part 1 *

Advance in Networking, Part 1 - Wednesday

Session video and resources: https://developer.apple.com/videos/play/wwdc2017/707/

Explicit congestion notification (ECN)

Bottleneck - packet transfer is cancelled:

Mark packet as congestion experiences.. <-less destructive
- Reduce Retransmissions
- Reduce delay
- Improve UX
Smart queue management

iPv6

Networking stack changes
New network extension facilities
Multipath protocols

NAT64

for providers which does not support iPv6

NEW: TCP/IPv6 in User Space not in Kernel space

Network Extension Framework

NEHotspotConfiguration:

Setting networks from the app itself..
Can be temporary or permanent (You can even set only when this app is used -network settings-)

NEDNSProxyProvider;

DNS over TLS/HTTP

Multipath Protocols For Mobile devices:

Wifi-Assist since iOS 9

Multipath TCP: (new)

When you leave home or on poor wifi - > wifi to Cellular link..

Improve reliability and UX..
Switch between smoothly

Public app in iOS 11 to enable MPTCP

Handover mode

Wifi to cellular vice versa.
Minimize cell usage, reliable for persistent connection)
Use it for important call which do not use so much data (avoid cellular data over usage)

Interactive mode (upcoming beta):

Low latency for low-volume interactive flows.. (wifi-cellular switch)

Aggregation mode (upcoming beta):

It is just a developer mode: (not for customer’s device)

Combines link capabilities
Available through developer settings