Build a Hyper-V capacity envelope from the correct limits
Which published maximum applies to a planned Hyper-V workload?
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Choose Hyper-V import identity and running-file locations
When should an imported virtual machine keep its identity or receive a new one?
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Separate pre-logon device VPN from user VPN requirements
Which Always On VPN profile is needed before a user signs in?
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Review accepted VPN protocols after installing or upgrading RRAS
Why should a new RRAS deployment and an upgraded server be checked separately?
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Accept DNS configuration from IPv6 router advertisements only within option lifetimes
An RDNSS option’s Lifetime is the maximum time its advertised recursive-server addresses may be used; a zero lifetime removes them immediately. A DNSSL option applies the same lifetime semantics to its advertised DNS search suffixes, including immediate withdrawal at zero.
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Advertise BGP capabilities in OPEN before using an optional feature
A BGP speaker advertises supported capabilities in the Capabilities Optional Parameter of its OPEN message. A capability may be used on a peering only after both peers have advertised support for it.
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Advertise OSPF maximum metrics when a router must remain non-transit
An OSPF router that must remain reachable but avoid transit advertises MaxLinkMetric on every non-stub link in its router-LSA. MaxLinkMetric is the 16-bit all-ones value 0xffff and signals that the advertised link should not carry transit traffic.
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Allocate BGP Large Community fields before encoding policy
A BGP Large Community is a 12-octet value containing a four-octet Global Administrator and two four-octet operator-defined local fields. The Global Administrator should be an ASN whose owner defines the two local fields; reserved ASNs are not recommended for that role.
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Apply BGP path selection before advertising a chosen route
BGP first assigns each feasible received route a policy-derived preference, then selects one best route per destination for the Loc-RIB. A route with an unresolvable NEXT_HOP is excluded from selection, and the chosen route is re-evaluated when next-hop reachability or IGP cost changes.
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Bound UDP datagrams and congestion response before adding reliability
An application using UDP should congestion-control the aggregate rate of every socket or worker sending to the same destination host.
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