432

Appendix A Common Services

Table 151 Commonly Used Services (continued)

NAME	PROTOCOL	PORT(S)	DESCRIPTION
ESP	User-Defined	50	The IPSEC ESP (Encapsulation Security
(IPSEC_TUNNEL)			Protocol) tunneling protocol uses this
			service.

FINGER	TCP	79	Finger is a UNIX or Internet related
			command that can be used to find out if a
			user is logged on.

FTP	TCP	20	File Transfer Program, a program to
	TCP	21	enable fast transfer of files, including
	TCP	21	large files that may not be possible by e-
			mail.

H.323	TCP	1720	NetMeeting uses this protocol.

HTTP	TCP	80	Hyper Text Transfer Protocol - a client/
			server protocol for the world wide web.

HTTPS	TCP	443	HTTPS is a secured http session often
			used in e-commerce.

ICMP	User-Defined	1	Internet Control Message Protocol is often
			used for diagnostic or routing purposes.

ICQ	UDP	4000	This is a popular Internet chat program.

IGMP	User-Defined	2	Internet Group Multicast Protocol is used
(MULTICAST)			when sending packets to a specific group
			of hosts.

IKE	UDP	500	The Internet Key Exchange algorithm is
			used for key distribution and
			management.

IRC	TCP/UDP	6667	This is another popular Internet chat
			program.

MSN Messenger	TCP	1863	Microsoft Networks’ messenger service
			uses this protocol.

NEW-ICQ	TCP	5190	An Internet chat program.

NEWS	TCP	144	A protocol for news groups.

NFS	UDP	2049	Network File System - NFS is a client/
			server distributed file service that
			provides transparent file sharing for
			network environments.

NNTP	TCP	119	Network News Transport Protocol is the
			delivery mechanism for the USENET
			newsgroup service.

PING	User-Defined	1	Packet INternet Groper is a protocol that
			sends out ICMP echo requests to test
			whether or not a remote host is reachable.

POP3	TCP	110	Post Office Protocol version 3 lets a client
			computer get e-mail from a POP3 server
			through a temporary connection (TCP/IP
			or other).

PPTP	TCP	1723	Point-to-Point Tunneling Protocol enables
			secure transfer of data over public
			networks. This is the control channel.

MGS3700-12C User’s Guide

metrogigabit switch specifications

ZyXEL Communications has long been a prominent player in the networking hardware industry, providing innovative solutions that cater to both business and consumer markets. Among their notable offerings is the Metrogigabit switch, a device designed to meet the high demands of modern networks.

The ZyXEL Metrogigabit switch is primarily aimed at service providers and large enterprises, recognizing the need for seamless connectivity in an increasingly digital world. This switch is engineered for scalability, enabling users to effortlessly expand their network as their operational needs grow. With support for high bandwidth, it is particularly suited for environments requiring extensive data traffic management, such as data centers and campus networks.

One of the standout features of the Metrogigabit switch is its high-density gigabit Ethernet ports, which provide a backbone for reliable data transmission. The switch typically supports multiple 10G SFP+ uplinks, ensuring fast and efficient connections to upstream devices. This capability allows users to configure their networks to handle large volumes of data quickly and without interruption.

In terms of technology, the Metrogigabit switch leverages advanced Layer 2 and Layer 3 functionalities. This includes features such as VLAN support for traffic segmentation, Quality of Service (QoS) for prioritizing mission-critical applications, and robust multicast management. These capabilities contribute to enhanced network efficiency and performance.

Another characteristic that sets the ZyXEL Metrogigabit switch apart is its built-in security features. The device is designed to protect network integrity through mechanisms like port security, access control lists, and advanced authentication protocols. This focus on security helps prepare businesses to counteract potential threats in a landscape where cyber attacks are increasingly sophisticated.

Moreover, the switch is equipped with a user-friendly management interface, which simplifies the process of monitoring and configuring network settings. This is complemented by support for SNMP and RMON, allowing network administrators to leverage tools for effective performance monitoring.

In summary, the ZyXEL Metrogigabit switch is an essential tool for organizations seeking robust performance, reliability, and security in their networking infrastructure. With its high-density ports, flexible configuration options, and comprehensive management features, it provides a strong foundation for building efficient and scalable networks. Whether for service providers or enterprises, this switch stands out as a reliable choice in the fast-evolving technological landscape.

ZyXEL Communications metrogigabit switch manual 432

Models: metrogigabit switch

Table 151 Commonly Used Services (continued)

NAME

FINGER

TCP

ICMP

NFS

UDP

NNTP

TCP

PING

POP3

TCP

PPTP

TCP

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metrogigabit switch specifications