Enterasys X-Pedition 2000 Getting Started Guide 3
Features
that are not shaded. Notice that Layer-2 is divided into an LLC layer and a MAC layer. The XP-
2000 operates at the MAC layer but not the LLC layer.

TCP/UDP Services

The following table lists some well known TCP/UDP services provided by the XP-2000.
Features
This section describes the following XP-2000 features:
• Address-based and flow-based bridging
• Port-based VLANs and protocol-based VLANs
• IP and IPX routing
• Layer-4 (application) switching
• Security
• Quality of Service (QoS)
Layer 7 Application
Layer 6 Presentation
Layer 5 Session
Layer 4 TCP/UDP - application
Layer 3 IP/IPX - routing
Layer 2 LLC
Layer 2 MAC -bridging
Layer 1 Physical Interfaces
Table 2. TCP/UDP services
TCP Port UDP Port Description
23 Telnet
161 SNMP
67 BOOTP/DHCP Relay Agent
520 Routed