From the developer:
"CommView is a program for monitoring Internet and Local Area Network (LAN) activity capable of capturing and analyzing network packets. It gathers information about data passing through your dial-up connection or Ethernet card and decodes the analyzed data. With CommView you can see the list of network connections and vital IP statistics and examine individual packets. Packets are decoded down to the lowest layer with full analysis of the most widespread protocols. Full access to raw data is also provided. Captured packets can be saved to log files for future analysis. A flexible system of filters makes it possible to drop packets you don't need or capture only those packets that you wish to capture. This application is designed for Internet users and small and medium-sized networks and can run on any Windows system. It requires an Ethernet or Wireless Ethernet network card supporting the NDIS 3.0 driver standard, or a standard dial-up adapter.
"Additionally, our new remote monitoring technology allows CommView users to capture network traffic on any computer where Remote Agent is running, regardless of the computer's physical location. To take advantage of this unique feature, you need to deploy CommView Remote Agent, an affordable add-on for CommView. CommView features full decoding of the following protocols: ARP, BCAST, BGP, BMP, CDP, DHCP, DIAG, DNS, EIGRP, FTP, GRE, HTTP, ICMP, ICQ, IGMP, IGRP, IPsec, IPv4, IPv6, IPX, HSRP, NCP, NDS, NetBIOS, NFS, NLSP, OSPF, POP3, PPP, PPPoE, RARP, RADIUS, RDP, RIP, RIPX, RPC, RSVP, RTSP, SAP, SER, SMB, SMTP, SNA, SNMP, SOCKS, SPX, TCP, TELNET, TFTP, UDP, VTP, WAP, WDOG, 802.1Q, 802.1X.
"The latest version features several new protocol decoding modules, formula syntax highlighting, a bandwidth usage indicator, improved Windows XP themes support, and a few other enhancements."