Zyxel-communications Internet Security Appliance ZyWALL5UTM 4.0 Manual de usuario descargar pdf (Pagina 690)

ZyWALL 5/35/70 Series User’s Guide

Appendix E IP Subnetting 690

APPENDIX E

IP Subnetting

IP Addressing

Routers “route” based on the network number. The router that delivers the data packet to the

correct destination host uses the host ID.

IP Classes

An IP address is made up of four octets (eight bits), written in dotted decimal notation, for

example, 192.168.1.1. IP addresses are categorized into different classes. The class of an

address depends on the value of its first octet.

• Class “A” addresses have a 0 in the left most bit. In a class “A” address the first octet is

the network number and the remaining three octets make up the host ID.

• Class “B” addresses have a 1 in the left most bit and a 0 in the next left most bit. In a class

“B” address the first two octets make up the network number and the two remaining

octets make up the host ID.

• Class “C” addresses begin (starting from the left) with 1 1 0. In a class “C” address the

first three octets make up the network number and the last octet is the host ID.

• Class “D” addresses begin with 1 1 1 0. Class “D” addresses are used for multicasting.

(There is also a class “E” address. It is reserved for future use.)

Table 254 Classes of IP Addresses

IP ADDRESS: OCTET 1 OCTET 2 OCTET 3 OCTET 4

Class A 0 Network number Host ID Host ID Host ID

Class B 10 Network number Network number Host ID Host ID

Class C 110 Network number Network number Network number Host ID

Note: Host IDs of all zeros or all ones are not allowed.

Therefore:

A class “C” network (8 host bits) can have 2

8

–2 or 254 hosts.

A class “B” address (16 host bits) can have 2

16

–2 or 65534 hosts.

A class “A” address (24 host bits) can have 2

24

–2 hosts (approximately 16 million hosts).

1 2 ... 685 686 687 688 689 690 691 692 693 694 695 ... 802 803

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Husqvarna 324LDX-Series User Manual (36 pages)

Brand: Husqvarna | Category: Petrol tool | Size: 1.35 MB |

English

Table of contents

X-series

1

CONTENTS

3

ODUCTION

4

GENERAL SAFETY PRECA

6

GENERAL SAFETY PRECAUTIONS

10

ASSEMBLY

11

FUEL HANDLING

13

STARTING AND STOPPING

15

WORKING TECHNIQUES

17

MAINTENANCE

19

TECHNICAL DATA

23

OBLIGATIONS

25

YOUR WARRANTY RIGHTS AND

25

.095"

27

2,4-2,7 mm

29

.095-.106"

29

´®z+SIo¶5(¨

36

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