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Netgear Router WGT624 V2 User Manual

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Page 91

Technical Specifications A-1
M-10153-01
Appendix A
Technical Specifications
This appendix provides technical specifications for the 108 Mbps Wireless Firewall Router 
WGT624 v2.
Network Protocol and Standards Compatibility
Data and Routing Protocols: TCP/IP, RIP-1, RIP-2, DHCP 
PPP over Ethernet (PPPoE)
Power Adapter
North America: 120V, 60 Hz, input
United Kingdom, Australia: 240V, 50 Hz, input
Europe: 230V, 50 Hz, input
Japan: 100V, 50/60 Hz, input
All regions (output): 12 V DC @ 1 A output, 22W...

Page 92

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
A-2 Technical Specifications
M-10153-01 Electromagnetic Emissions
Meets requirements of: FCC Part 15 Class B
VCCI Class B
EN 55 022 (CISPR 22), Class B
Interface Specifications
LAN: 10BASE-T or 100BASE-Tx, RJ-45
WAN: 10BASE-T, RJ-45
Wireless
Radio Data Rates 1, 2, 5.5, 6, 9, 12, 18, 24, 36, 48, 54, and 108 Mbps  
Auto Rate Sensing
Frequency 2.4-2.5 GHz
Data Encoding: Direct Sequence Spread Spectrum (DSSS)
Maximum Computers Per 
Wireless...

Page 93

Network, Routing, Firewall, and Basics B-1
M-10153-01
Appendix B
Network, Routing, Firewall, and Basics
This chapter provides an overview of IP networks, routing, and networking.
Related Publications
As you read this document, you may be directed to various RFC documents for further 
information. An RFC is a Request For Comment (RFC) published by the Internet Engineering 
Task Force (IETF), an open organization that defines the architecture and operation of the Internet. 
The RFC documents outline and...

Page 94

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
B-2 Network, Routing, Firewall, and Basics
M-10153-01
Routing Information Protocol
One of the protocols used by a router to build and maintain a picture of the network is the Routing 
Information Protocol (RIP). Using RIP, routers periodically update one another and check for 
changes to add to the routing table.
The WGT624 v2 wireless router supports both the older RIP-1 and the newer RIP-2 protocols. 
Among other improvements, RIP-2...

Page 95

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
Network, Routing, Firewall, and Basics B-3
M-10153-01 Figure 7-1:  Three Main Address Classes
The five address classes are:
• Class A 
Class A addresses can have up to 16,777,214 hosts on a single network. They use an eight-bit 
network number and a 24-bit node number. Class A addresses are in this range: 
1.x.x.x to 126.x.x.x. 
• Class B 
Class B addresses can have up to 65,354 hosts on a network. A Class B address uses a 16-bit...

Page 96

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
B-4 Network, Routing, Firewall, and Basics
M-10153-01
This addressing structure allows IP addresses to uniquely identify each physical network and each 
node on each physical network.
For each unique value of the network portion of the address, the base address of the range (host 
address of all zeros) is known as the network address and is not usually assigned to a host. Also, 
the top address of the range (host address of all ones) is...

Page 97

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
Network, Routing, Firewall, and Basics B-5
M-10153-01
Subnet addressing allows us to split one IP network address into smaller multiple physical 
networks known as subnetworks. Some of the node numbers are used as a subnet number instead. 
A Class B address gives us 16 bits of node numbers translating to 64,000 nodes. Most 
organizations do not use 64,000 nodes, so there are free bits that can be reassigned. Subnet 
addressing makes use...

Page 98

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
B-6 Network, Routing, Firewall, and Basics
M-10153-01
The following table lists the additional subnet mask bits in dotted-decimal notation. To use the 
table, write down the original class netmask and replace the 0 value octets with the dotted-decimal 
value of the additional subnet bits. For example, to partition your Class C network with subnet 
mask 255.255.255.0 into 16 subnets (4 bits), the new subnet mask becomes 255.255.255.240....

Page 99

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
Network, Routing, Firewall, and Basics B-7
M-10153-01
• So that hosts recognize local IP broadcast packets
When a device broadcasts to its segment neighbors, it uses a destination address of the local 
network address with all ones for the host address. In order for this scheme to work, all devices 
on the segment must agree on which bits comprise the host address. 
• So that a local router or bridge recognizes which addresses are local...

Page 100

Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v2
B-8 Network, Routing, Firewall, and Basics
M-10153-01
The following figure illustrates a single IP address operation.
 
Figure 7-3:  Single IP Address Operation Using NAT
This scheme offers the additional benefit of firewall-like protection because the internal LAN 
addresses are not available to the Internet through the translated connection. All incoming 
inquiries are filtered out by the router. This filtering can prevent intruders...
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