Intel BLADE SERVER IXM5414E - Manuale (Pagina 63)

40 Intel® Blade Server Ethernet Switch Module IXM5414E: Installation and User’s Guide:A Guide for Technically
Secure Socket Layer (SSL)
Managing devices with a web browser has been standard practice for several years. Unfortunately
standard HTTP transactions are no more secure than Telnet. The solution is the use of the Secure
Sockets Layer (SSL) protocol which provides a means of abstracting an encrypted connection
between two stations. Once established, such a connection is virtually no different to use than an
unsecured connection. This allows an established protocol (e.g. HTTP) to operate in a secure
manner on an open network.
Quality of Service (QoS)
The Quality of Service (QoS) features of the Intel® Blade Server Ethernet Switch Module
IXM5414E allow you to allocate network bandwidth according to the needs of the network users.
This section will give you an overview of the methods available.
Quality of Service technologies are intended to provide guaranteed, timely, delivery of specific
application data to a particular destination. In contrast, standard IP-based networks are designed to
provide “best effort” data delivery service. Best effort service implies that the network will attempt
to deliver the data in a timely fashion, although there is no guarantee. During times of congestion,
packets may be delayed, sent sporadically or dropped. For typical Internet applications, such as
electronic mail and file transfer, a slight degradation in service is acceptable and in many cases is
unnoticeable. Conversely, any degradation of service has undesirable effects on applications with
strict timing requirements, such as voice or multimedia.
QoS is a means of providing consistent, predictable data delivery by distinguishing packets that have
strict timing requirements from those that are more tolerant of delay. Packets with strict timing
requirements are given special treatment in a QoS-capable network. To accomplish this, all elements
of the network must be QoS-capable. If one node is unable to meet the necessary timing
requirements, this creates a deficiency in the network path and the performance of the entire packet
flow is compromised.
Table 3. Secure Sockets Layer Details
SSL Feature Component Type
Protocols Secured HTTP
Ciphers • RC4
• DES
• 3DES
Hash Algorithms • MD5
• SHA-1
Key Exchange Methods • Diffie-Hellman
• RSA
SSL Protocol Versions • TLS 1.0
• SSL 3.0