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Converting Between Binary and Prefix Masks 305 Converting Between Binary and DDN Masks 306 Converting Between Prefix and DDN Masks 308 Practice Converting Subnet Masks 309 |
Identifying Subnet Design Choices Using Masks 309 |
Masks Divide the Subnet’s Addresses into Two Parts 311 Masks and Class Divide Addresses into Three Parts 312 Classless and Classful Addressing 312 |
Calculations Based on the IPv4 Address Format 313 Practice Analyzing Subnet Masks 315 |
Chapter Review 315 |
Chapter 14 Analyzing Existing Subnets 320 “Do I Know This Already?” Quiz 320 Foundation Topics 322 |
Defining a Subnet 322 |
An Example with Network 172.16.0.0 and Four Subnets 322 Subnet ID Concepts 324 |
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xx CCNA 200-301 Official Cert Guide, Volume 1 |
Subnet Broadcast Address 325 Range of Usable Addresses 325 |
Analyzing Existing Subnets: Binary 326 Finding the Subnet ID: Binary 326 |
Finding the Subnet Broadcast Address: Binary 327 Binary Practice Problems 328 |
Shortcut for the Binary Process 330 Brief Note About Boolean Math 331 Finding the Range of Addresses 331 |
Analyzing Existing Subnets: Decimal 331 Analysis with Easy Masks 332 Predictability in the Interesting Octet 333 Finding the Subnet ID: Difficult Masks 334 |
Resident Subnet Example 1 334 Resident Subnet Example 2 335 Resident Subnet Practice Problems 336 |
Finding the Subnet Broadcast Address: Difficult Masks 336 Subnet Broadcast Example 1 337 |
Subnet Broadcast Example 2 337 |
Subnet Broadcast Address Practice Problems 338 Practice Analyzing Existing Subnets 338 |
A Choice: Memorize or Calculate 338 Chapter Review 339 |
Part IV Review 344 |
Part V IPv4 Routing 347 |
Chapter 15 Operating Cisco Routers 348 |
“Do I Know This Already?” Quiz 348 Foundation Topics 350 |
Installing Cisco Routers 350 Installing Enterprise Routers 350 |
Cisco Integrated Services Routers 352 Physical Installation 353 |
Installing SOHO Routers 354 |
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xxi |
Enabling IPv4 Support on Cisco Router Interfaces 355 Accessing the Router CLI 355 |
Router Interfaces 356 Interface Status Codes 358 |
Router Interface IP Addresses 360 |
Bandwidth and Clock Rate on Serial Interfaces 361 Router Auxiliary Port 362 |
Chapter Review 362 |
Chapter 16 Configuring IPv4 Addresses and Static Routes 366 “Do I Know This Already?” Quiz 367 |
Foundation Topics 369 IP Routing 369 |
IPv4 Routing Process Reference 369 An Example of IP Routing 371 |
Host Forwards the IP Packet to the Default Router (Gateway) 372 Routing Step 1: Decide Whether to Process the Incoming Frame 373 Routing Step 2: De-encapsulation of the IP Packet 373 |
Routing Step 3: Choosing Where to Forward the Packet 374 Routing Step 4: Encapsulating the Packet in a New Frame 375 Routing Step 5: Transmitting the Frame 376 |
Configuring IP Addresses and Connected Routes 376 Connected Routes and the ip address Command 376 The ARP Table on a Cisco Router 378 |
Configuring Static Routes 379 Static Network Routes 379 Static Host Routes 381 Floating Static Routes 381 Static Default Routes 383 |
Troubleshooting Static Routes 384 |
Troubleshooting Incorrect Static Routes That Appear in the IP Routing Table 385 |
The Static Route Does Not Appear in the IP Routing Table 385 The Correct Static Route Appears but Works Poorly 386 |
IP Forwarding with the Longest Prefix Match 386 Using show ip route to Find the Best Route 386 |
Using show ip route address to Find the Best Route 388 Interpreting the IP Routing Table 388 |
Chapter Review 390 |
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xxii CCNA 200-301 Official Cert Guide, Volume 1 |
Chapter 17 IP Routing in the LAN 392 |
“Do I Know This Already?” Quiz 393 Foundation Topics 395 |
VLAN Routing with Router 802.1Q Trunks 395 Configuring ROAS 396 |
Verifying ROAS 398 Troubleshooting ROAS 400 |
VLAN Routing with Layer 3 Switch SVIs 401 Configuring Routing Using Switch SVIs 401 Verifying Routing with SVIs 403 Troubleshooting Routing with SVIs 404 |
VLAN Routing with Layer 3 Switch Routed Ports 406 Implementing Routed Interfaces on Switches 407 Implementing Layer 3 EtherChannels 410 Troubleshooting Layer 3 EtherChannels 413 |
Chapter Review 414 |
Chapter 18 Troubleshooting IPv4 Routing 418 “Do I Know This Already?” Quiz 418 Foundation Topics 419 |
Problem Isolation Using the ping Command 419 Ping Command Basics 419 |
Strategies and Results When Testing with the ping Command 420 Testing Longer Routes from Near the Source of the Problem 421 Using Extended Ping to Test the Reverse Route 423 |
Testing LAN Neighbors with Standard Ping 425 Testing LAN Neighbors with Extended Ping 426 Testing WAN Neighbors with Standard Ping 427 |
Using Ping with Names and with IP Addresses 427 Problem Isolation Using the traceroute Command 428 |
traceroute Basics 429 |
How the traceroute Command Works 429 Standard and Extended traceroute 431 |
Telnet and SSH 432 |
Common Reasons to Use the IOS Telnet and SSH Client 432 IOS Telnet and SSH Examples 433 |
Chapter Review 435 |
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