What does VPN Reconnect do?

VPN Reconnect is a new feature of Routing and Remote Access service (RRAS) that provides users with seamless and consistent VPN connectivity, automatically reestablishing a VPN when users temporarily lose their Internet connection. Users who connect using wireless mobile broadband will benefit most from this capability. With VPN Reconnect, Windows 7 automatically reestablishes active VPN connections when Internet connectivity is reestablished. Although the reconnection might take several seconds, it is transparent to users.
VPN Reconnect uses IPsec tunnel-mode with Internet Key Exchange version 2 (IKEv2), which is described in RFC 4306, specifically taking advantage of the IKEv2 mobility and multihoming extension (MOBIKE) described in RFC 4555.
Are there any special considerations?
VPN Reconnect is implemented in the RRAS role service of the Network Policy and Access Services (NPAS) role of a computer running Windows Server 2008 R2. Infrastructure considerations include those for NPAS and RRAS. Client computers must be running Windows 7 to take advantage of VPN Reconnect.
What does BranchCache do?
With BranchCache, content from Web and file servers on the enterprise WAN is stored on the local branch office network to improve response time and reduce WAN traffic. When another client at the same branch office requests the same content, the client can access it directly from the local network without obtaining the entire file across the WAN. BranchCache can be set up to operate in either a distributed cache mode or a hosted cache mode. Distributed cache mode uses a peer-to-peer architecture. Content is cached at the branch office on the client computer that firsts requests it. The client computer subsequently makes the cached content available to other local clients. Hosted cache mode uses a client/server architecture. Content requested by a client at the branch office is subsequently cached to a local server (called the hosted cache server), where it is made available to other local clients. In either mode, before a client retrieves content, the server where the content originates authorizes access to the content, and content is verified to be current and accurate using a hash mechanism.
Are there any special considerations?
BranchCache supports HTTP, including HTTPS, and Server Message Block (SMB), including signed SMB. Content servers and the hosted cache server must be running Windows Server 2008 R2, and client computers must be running Windows 7.