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... with IP Addresses CHAPTER 10
Table 10.2 Basic Subnet Masks
Class Subnet Mask
A 255 .0.0.0
B 255 . 255 .0.0
C 255 . 255 . 255 .0
In the basic subnet masks (where no subnetting has been done) the
octet either ... asked
to provide the password to enter the router.
1 6 0
Platform The type of Cisco router. 250 5 (the neighbor is a 250 5
router)
Port ID The interface used on the Serial 0
neighbor...
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... Selected Cisco Router Specifications 337
Router Selection 338
Cisco 750 0 Routers 338
Cisco 450 0 Routers 339
Cisco 250 0 Routers 340
Cisco 1000 Routers 341
A Final Note 342
Glossary 343
Index 359
1 ... 45
TCP/IP 45
IPX/SPX 48
AppleTalk 49
3 Wide Area Networking 53
Understanding Wide Area Connectivity 54
Getting Connected 54
Dial-Up Connections 55
Leased Lines 56...
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... popular packet
switching protocols.
X. 25
X. 25 was designed for use over the PDNs that were operated by
companies such as AT&T and General Electric. The X. 25 protocol
stack provides point-to-point ... a
PDN via a router. The X. 25 protocol can then handle a connection
between these two DTE devices on the WAN, so that they can
exchange data (see Figure 3 .5) .
The X. 25 protocol st...
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... fraction
255 / 255 represents a 100% reliable link.
PART I Networking Overview
CHAPTER 5 Ho w a Rout er Wo r k s
IGRP is all Cisco
Because IGRP was
developed by Cisco and
remains a Cisco proprietary
protocol, ... consist of 255
hops or fewer. This means
that theoretically packets
could be moved between
255 devices as the packets
move from source to desti-
nation. This is why the
n...
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... and ready for deployment on
the network. Figure 7.1 shows the front and back of the Cisco 250 5
router. The 250 5 router provides only three interfaces, one LAN and
two serial interfaces, and is ... Cisco router 60-pin
serial port connector.
The Cisco 250 5 Router (shown in Figure 7.6) supplies two serial
ports. The serial port supports several different signaling standards
including V....
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... Hosts/Subnet
2 2 255 . 255 .192.0 16,382
6 3 255 . 255 .224.0 8,190
14 4 255 . 255 .240.0 4,094
30 5 255 . 255 .248.0 2,046
62 6 255 . 255 . 252 .0 1,022
126 7 255 . 255 . 254 .0 51 0
254 8 255 . 255 . 255 .0 254
PART III Rout ... Hosts/Subnet
2 2 255 .192.0.0 4,194,302
6 3 255 .224.0.0 2,097, 150
14 4 255 .240.0.0 1,048 ,57 4
30 5 255 .248.0.0 52 4,286
62 6 255 . 252 .0.0 262,142
12...
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... from the
pool of 255 numbers—0,
254 , and 255 . The node
number 0 isreserved for
temporary use by nodes
attempting to determine
which network they reside
on. Node numbers 254 and
255 are used in broadcast
messages ... Figure 13 .5 shows two different sites connected using
250 5 routers.
PART III Routing LAN Protoco ls
CHAPTER 13 Routing AppleTa l k
FIGURE 13 .5
Two AppleTalk LANS can
b...
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... lists all the routers in the 250 0 series family (see Figure
16.2).
2. To add a 250 5 router to the diagram, click the 250 5 icon and
then click in the Diagram window. The Cisco 250 5 Router
Wizard ... devices: a 250 5 router and an Ethernet LAN.
Adding routers to the Diagram window
1. First, you will add a 250 5 router to the diagram. Scroll down
through the Device list until you see t...
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... pounds
Cisco 250 0 Routers
The Cisco 250 0 series routers are inexpensive routers and are con-
sidered access-level routers. Figure B.2 shows the 250 5 router, and
Table B.3 explains the 250 5 specifications. ... Cisco Router
S p e c i f i c a t i o n s
Router Selection
•
Cisco 750 0 Routers
•
Cisco 450 0 Routers
•
Cisco 250 0 Routers
•
Cisco 1000 Routers
•
A Fina...
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... purchase, 1 15
Cisco 1000 routers, 341
Cisco 250 0 routers, 340
Cisco 250 5 routers, 112
Cisco 450 0 routers, 339-340
Cisco 750 0 routers, 338
Cisco IOS, 1 15, 342
console
connecting, 116-117
terminal ... routers, 341
Cisco 250 0 routers, 340
Cisco 250 5 routers, 112
Cisco 450 0 routers,
339-340
Cisco 750 0 routers, 338
Cisco IOS, 1 15, 342
selecting, 338
wei...