D-Link DWS/DXS-3200 manual Sntp

DXS/DWS 3200 Series User Guide

F e a t u r e	D e s c r i p t i o n
SNTP	The Simple Network Time Protocol (SNTP) assures accurate net-
	work Ethernet Switch clock time synchronization up to the milli-
	second. Time synchronization is performed by a network SNTP
	server. Time sources are established by Stratums. Stratums
	define the distance from the reference clock. The higher the stra-
	tum (where zero is the highest), the more accurate the clock.
Spanning Tree Protocol	802.1d Spanning tree is a standard Layer 2 switch requirement
	that allows bridges to automatically prevent and resolve L2 for-
	warding loops. Switches exchange configuration messages using
	specifically formatted frames and selectively enable and disable
	forwarding on ports.
SSH 2.0	Secure Shell (SSH) is a protocol that provides a secure, remote
	connection to a device. SSH version 2 is currently supported. The
	SSH server feature enables an SSH client to establish a secure,
	encrypted connection with a device. This connection provides
	functionality that is similar to an inbound telnet connection. SSH
	uses RSA and DSA Public Key cryptography for device connec-
	tions and authentication.
SSL 3.0	Secure Socket Layer (SSL) is an application-level protocol that
	enables secure transactions of data through privacy, authentica-
	tion, and data integrity. It relies upon certificates and public and
	private keys.
Static MAC Entries	MAC entries can be manually entered in the Bridging Table, as an
	alternative to learning them from incoming frames. These user-
	defined entries are not subject to aging, and are preserved across
	resets and reboots.
TACACS+	TACACS+ provides centralized security for validation of users
	accessing the device. TACACS+ provides a centralized user
	management system, while still retaining consistency with
	RADIUS and other authentication processes.
TCP	Transport Control Protocol (TCP). TCP connections are defined
	between 2 ports by an initial synchronization exchange. TCP
	ports are identified by an IP address and a 16-bit port number.
	Octets streams are divided into TCP packets, each carrying a
	sequence number.
TFTP Trivial File Transfer Protocol	The device supports boot image, software and configuration
	upload/download via TFTP.
Traceroute	Traceroute discovers IP routes that packets were forwarded
	along during the forwarding process. The CLI Traceroute utility
	can be executed from either the user-exec or privileged modes.
Virtual Cable Testing	VCT detects and reports copper link cabling occurrences, such as
	open cables and cable shorts.

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