ZyXEL Communications LTE5388-M804 User Manual

LTE Series User’s Guide
229
CHAPTER 20
ARP Table
20.1 ARP Table Overview
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol (IP) address to a
physical machine address, known as a Media Access Control (MAC) address, on the local area
network.
An IP version 4 address is 32 bits long. MAC addresses are 48 bits long. The ARP table maintains an
association between each MAC address and its corresponding IP address.
20.1.1 How ARP Works
When an incoming packet destined for a host device on a local area network arrives at the device, the
device's ARP program looks in the ARP table and, if it finds the address, sends it to the device.
If no entry is found for the IP address, ARP broadcasts the request to all the devices on the LAN. The
device fills in its own MAC and IP address in the sender address fields, and puts the known IP address of
the target in the target IP address field. In addition, the device puts all ones in the target MAC field
(FF.FF.FF.FF.FF.FF is the Ethernet broadcast address). The replying device (which is either the IP address of
the device being sought or the router that knows the way) replaces the broadcast address with the
target's MAC address, swaps the sender and target pairs, and unicasts the answer directly back to the
requesting machine. ARP updates the ARP table for future reference and then sends the packet to the
MAC address that replied.

ZyXEL Communications LTE5388-M804 Specifications

General

DSL WAN	No
Ethernet WAN	Yes
WAN connection type	RJ-45
Wi-Fi band	Dual-band (2.4 GHz / 5 GHz)
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Top Wi-Fi standard	Wi-Fi 5 (802.11ac)
WLAN data transfer rate (max)	1733 Mbit/s
WLAN data transfer rate (first band)	300 Mbit/s
Networking standards	IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
4G standard	LTE-TDD & LTE-FDD
3G standards	HSPA+, HSUPA, WCDMA
UMTS bands supported	850, 900, 1800, 2100 MHz
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
MAC address table	64 entries
Security algorithms	WPA, WPA2
Supported network protocols	IPv4/IPv6
Product type	Tabletop router
Product color	Grey, White
LED indicators	LTE, Power, USB, WLAN
Power source type	DC
Power consumption (typical)	24 W
Certification	CE, WEEE, RoHS, HSF
Storage temperature (T-T)	-30 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 90 %
Cables included	LAN (RJ-45), Phone (RJ-11)
Package type	Box
Package depth	170 mm
Package width	247 mm
Package height	120 mm
Package weight	1600 g
Harmonized System (HS) code	85176990

Weight and Dimensions

Width	100 mm
Height	205 mm
Weight	599 g