3Com 4210G PWR 24-port Switch P/N: JF846A, 3CRS42G-24P-91Features and benefits Layer 4 prioritization: enables prioritization based on TCP UDP port numbers Traffic prioritization (IEEE 802. 1p): allows real time traffic classification into eight priority levels mapped to eight queues Class of Service (CoS): sets the IEEE 802. 1p priority tag based on IP address, IP Type of Service (ToS), Layer 3 protocol, TCP UDP port number, source port, and DiffServ Rate limiting: sets per port ingress enforced maximums