ZyXEL Communications N4100 User Manual

Chapter 4 System Setup
N4100 User’s Guide
69
4.3.2 How iPnP Works
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol
address (IP address) to a physical machine address, also known as a Media Access
Control or MAC address, on the local area network. IP routing table is defined on
IP Ethernet devices (the N4100) to decide which hop to use,
to help forward data
along to its specified destination.
The following lists out the steps taken, when a computer tries to access the
Internet for the first time through the N4100.
1 When a computer (which is in a different subnet) first attempts to access the
Internet, it sends packets to its default gateway (which is not the N4100) by
looking at the MAC address in its ARP table.
2 When the computer cannot locate the default gateway, an ARP request is
broadcast on the LAN.
3 The N4100 receives the ARP request and replies to the computer with its own MAC
address.
4 The computer updates the MAC address for the default gateway to the ARP table.
Once the ARP table is updated, the computer is able to access the Internet
through the N4100.
5 When the N4100 receives packets from the computer, it creates an entry in the IP
routing table so it can properly forward packets intended for the computer.
After all the routing information is updated, the computer can access the N4100
and the Internet as if it is in the same subnet as the N4100.

ZyXEL Communications N4100 Specifications

General

Number of users	100 user(s)
Ethernet LAN data rates	10, 100 Mbit/s
Maximum data transfer rate	100 Mbit/s
Indoor range	35 ~ 100 m
Outdoor range	100 ~ 300 m
Connectivity LEDs	Yes
Internal	No
Certification	FCC, CE, C-Tick, NCC, RoHS, WEEE
Security algorithms	802.1x RADIUS
Power requirements	100-240 VAC, 50/60 Hz, 0.5 A
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	10 - 95 %

Weight and Dimensions

Weight	565 g
Dimensions (WxDxH)	222 x 146 x 152 mm