Are You Smarter Than a CCENT? Transport Layer

May 21, 2017 at 11:43 am

Here is a query from a current project – enjoy!

  1. You are examining a packet capture from your local network. What two determinations can you make from this output? (Choose 2)

100-105a. This is a UDP packet
b. This is a TCP packet
c. The target destination is FTP
d. The target destination is HTTP

Correct Answer: b, d

Explanation: Due to its use of reliable transmissions, Transmission Control Protocol (TCP) uses many fields in its packet structure. These include:

  • source TCP port number
  • destination TCP port number
  • sequence number
  • acknowledgement number
  • TCP data offset
  • reserved data
  • control flags
  • window size
  • TCP checksum
  • urgent pointer
  • TCP optional data

In contrast, the unreliable User Datagram Protocol (UDP) packets feature these simple fields:

  • source port number
  • destination port number
  • length
  • checksum

From the destination TCP port number here of 80, you can determine the intended target service is the Hypertext Transfer Protocol (HTTP). Know the following common ports for this exam:

Port Number TCP or UDP Protocol
20 TCP FTP Data
21 TCP FTP Control
22 TCP SSH
23 TCP Telnet
25 TCP SMTP
53 UDP DNS
67, 68 UDP DHCP
69 UDP TFTP
80 TCP HTTP
110 TCP POP3
161 UDP SNMP
443 TCP SSL/TLS
514 UDP Syslog
520 UDP RIP

ICND1 100-105 NAT Quiz!

February 6, 2017 at 8:42 pm

NAT

Good luck with this quiz based on questions from my ICND1 Exam Cram for 100-105!

CCENT 100-105 Configure, Verify, and Troubleshoot Inside Source NAT

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My ExamCram CCENT ICND1 100-105 is Here!

January 11, 2017 at 10:40 pm

100-105

It is an amazing feeling when you actually get to hold your latest book in your hands after all that hard work in a virtual place! Huge thank you to Keith Barker of CBT Nuggets for his incredibly in-depth edits on this remarkable text.

What does this text provide you?

CramSheets

The first thing you will note in this text is a laminated set of CramSheets you can tear out of the text introduction. This allows you to carry it with you right to the testing center and contains key charts, notes, and configurations you want to have committed to memory. An example would be the binary conversion chart! I really crammed the CramSheet – in fact, the publishers made me trim it down I was trying to get so many goodies in there. Remember, leave it in the locker before your actual test – you would breaks the rules bringing it to the testing PC! 🙂

Chapters and Topics

The Chapter and Topic layout follows the Cisco Exam Blueprint letter for letter! Worried about a certain area of the exam coverage? No problem – go right to that section of my text and have your fears put to rest!

Essential Terms and Components

Each chapter begins with a list of essential terms and components you must master if you are to have any success in the exam environment. Of course, each chapter hammers and highlights these.

CramSavers

Before every topic begins, this text presents you with a CramSaver. What is the point here? To challenge you with difficult fill in the blank style questions to pre-test you. Perhaps you already have mastery in this topic domain and would prefer to skip it!

ExamAlerts

These occur where required and highlight key pieces of exam relevant information you just MUST know in order to succeed.

CramQuiz

Of course every topic area must end with a CramQuiz. These are in multiple choice format since this is the majority of what you will face in the actual exam.

Review Questions

Each chapter wraps up with intense review questions. This is a nice feature as it gives you confidence in testing on all of the topics that make up a chapter. Keep in mind that some of the chapters might have as many as four or five intense topic domains.

Additional Resources

This section has never existed in an ExamCram text before. I wanted to include videos and documents to supplement each chapter. Videos includes the works of such greats as Jeremy Cioara, Keith Barker, and others.

Command Reference

I also added this ingredient never before added to the Cisco ExamCrams. At this level, students love a quick review of the commands they must master.

Practice Exams

Two full practice exams of 60 questions each challenge the learner big time! These include questions that mirror the simulations found in the actual exam!

Glossary

OK – yeah – there is a glossary of important terms. 🙂

Whew – listing all of this sure makes me recall the hard work that went into this text. I hope you find it as special as those of us that poured our hearts into it did! Enjoy!

 ExamCram CCENT ICND1 100-105
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Three New Certification Texts Coming from Anthony Sequeira

October 22, 2016 at 4:52 pm

Yes – I have been hard at work writing this summer and fall, especially with the exciting new products and certifications that area available for us in the IT world!

CCENT 100 -105 Exam Cram, 3rd Edition

Preorder now!

This text will take you through bullet point by bullet pint in the new Version 3 of the CCENT (ICND1) exam. This critical text features the following special features that you will love!

  • CramSavers
  • Exam Alerts
  • Command Reference
  • Two Full Practice Exams
  • Cram Sheets
  • Cram Exams

CCNA Routing and Switching 200-125 Exam Cram (5th Edition)

Preorder now!

Exam 70-740 – Installation, Storage, and Compute with Windows Server 2016 Certification Guide

I hope you are excited about these new texts as I am  – Happy Reading!

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HSRP Configuration

October 20, 2016 at 2:54 pm

Here is another exciting resource from my upcoming CCNA Exam Cram!

CCNA Routing and Switching 200-125 Network Simulator