ultimate goal is to allow data communication among all UPnP devices regardless of media, operating
system, programming language, and wired/wireless connection.
5.23 What is Maximum Transmission Unit (MTU) Size?
Maximum Transmission Unit (MTU) indicates the network stack of any packet is larger than this value
will be fragmented before the transmission. During the PPP negotiation, the peer of the PPP connection
will indicate its MRU and will be accepted. The actual MTU of the PPP connection will be set to the
smaller one of MTU and the peer’s MRU.
5.24 What is Clone MAC Address?
Clone MAC address is designed for your special application that request the clients to register to a
server machine with one identified MAC address. Since that all the clients will communicate outside
world through the WLAN Broadband Router, so have the cloned MAC address set on the WLAN
Broadband Router will solve the issue.
5.25 What is DDNS?
DDNS is the abbreviation of Dynamic Domain Name Server. It is designed for user owned the DNS
server with dynamic WAN IP address.
5.26 What is NTP Client?
NTP client is designed for fetching the current timestamp from internet via Network Time protocol.
User can specify time zone, NTP server IP address.
5.27 What is VPN?
VPN is the abbreviation of Virtual Private Network. It is designed for creating point-to point private
link via shared or public network.
5.28 What is IPSEC?
IPSEC is the abbreviation of IP Security. It is used to transferring data securely under VPN.
5.29 What is WLAN Block Relay between Clients?
An Infrastructure Basic Service Set is a BSS with a component called an Access Point (AP). The access
point provides a local relay function for the BSS. All stations in the BSS communicate with the access
point and no longer communicate directly. All frames are relayed between stations by the access point.
This local relay function effectively doubles the range of the IBSS.
5.30 What is WMM?
WMM is based on a subset of the IEEE 802.11e WLAN QoS draft standard. WMM adds prioritized
capabilities to Wi-Fi networks and optimizes their performance when multiple concurring applications,
each with different latency and throughput requirements, compete for network resources. By using
WMM, end-user satisfaction is maintained in a wider variety of environments and traffic conditions.
WMM makes it possible for home network users and enterprise network managers to decide which
data streams are most important and assign them a higher traffic priority.
5.31 What is WLAN ACK TIMEOUT?
ACK frame has to receive ACK timeout frame. If remote does not receive in specified period, it will be
retransmitted.
5.32 What is Modulation Coding Scheme (MCS)?
MCS is Wireless link data rate for 802.11n. The throughput/range performance of an AP will depend on
its implementation of coding schemes. MCS includes variables such as the number of spatial streams,
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