Page 141 of the DSE Networks & Infrastructure knowledge center, with source-backed guidance and practical next steps.
Guidance for resilient networks, Wi-Fi, firewalls, cabling, power, exposure reduction, and connected-device planning.
A server rejects a WebSocket opening request that lacks the required GET, Host, Upgrade, Connection, 16-byte encoded key, or version-13 fields. Accepting the connection requires status 101, Upgrade and Connection fields, and Sec-WebSocket-Accept computed from the client’s key and the protocol GUID.
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QUIC declares an in-flight packet lost only after a later packet is acknowledged and either the packet threshold or time threshold is met. A Probe Timeout sends one or two probe datagrams, but expiration alone does not indicate loss and must not mark prior unacknowledged packets lost.
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Each HTTP/3 request occupies one client-initiated bidirectional stream, with interim and final responses returned on that same stream. Each endpoint creates exactly one control stream, sends SETTINGS first, and keeps that critical stream open for the connection’s lifetime.
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Without resource-specific permission, an origin server must reject early data or defer request processing until the TLS handshake completes. Clients may send known-safe methods in early data but must not send unsafe or unknown-safety methods; a 425 response requires retry without early data.
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A user agent establishes or updates dynamic HSTS state only from a valid Strict-Transport-Security field received over error-free secure transport and ignores the field over insecure HTTP.
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A Web link consists of a context IRI, relation type, target IRI, and optional target attributes; serialized link ordering carries no inherent significance. Registered relation names are case-insensitive tokens and cannot constrain context or target representation media types.
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A Structured Field serializer accepts a defined List, Dictionary, or Item and returns ASCII; it omits an empty List or Dictionary and fails when the supplied structure cannot be serialized.
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An HTTP/1.1 recipient parses the message as octets, not an unconstrained Unicode stream, before interpreting extracted protocol elements.
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A server supporting PATCH should advertise each accepted patch-document media type in Accept-Patch; the header’s presence also indicates that PATCH is allowed for that resource.
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Before parsing a URI reference that might be relative, a parser must establish an absolute base URI; a reference used as that base is first made absolute and stripped of its fragment.
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