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Home > Archive > CCNA > February 2004 > New ccna format : 2 exams or 1?
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New ccna format : 2 exams or 1?
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| Chammi 2004-02-22, 6:53 am |
| Hello all
Its been a long time since I posted. I started to prepare for the 640-607 exam but didnt finish so I am determined to get the new CISCO CCNA exam this time round.
I have a few questions on the new CCNA exam format:
1)Sybex doesnt seem to cover the Intro and ICND exams, so you have to rely on CISCO books - is this right?
2)Are there any transcender help for the Intro and ICND exams as i cant find any?
3)I have found a few resources for the 801 exam online but non for the Intro and ISND course - why?
4)What route is best in your opinion the 801 or the 821/811 ?
Kind regards
Sunny  | |
| Joe Dali 2004-02-22, 11:35 pm |
| Transcender sucks badly. I'm getting refund after my 801 fail ... its totally outdated, I talked to their sales chick last week for like half an hour trying to tell her how bad it sucked and she was dumbfounded. Its so out of date its hilarious.
Buy Odoms Cisco 59.99 set. Read it. Use the CD tests, they are excellent. Lots of simulations. Its clunky but works to reinforce all the hands on. I'm on page 309 on book 2, and I can honestly say after taking the 801 and failing this is the key.
You cannot rely on Lammle alone. Lammle's config examples at the end of each chapter are great. But, overall lacks in objectives. I'm still using it in addition to odom though. It has good info, but its not on the test.
Trust me, I got an 8**, and had I read Odom, I woulda been golden.
I'm re-taking 801 this week, and I am so confident, its oozing out my orifices.
Your road to success --
---memorize the Lammle & Odom book inside and out, every section heading and subject or you will die a mizerably painful death.
---Read the cisco press flash cards in your car before the test or you will surely die a long slow excruiating saddaam bio weaponry style nerve gas testing center death.
---quit worrying about subnetting - if you can subnet you'll be ok
---Configure OSPF and know areas inside and out, do it on a router live, or you will die in the sim
---configure RIP across 3 routers side by side
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---know all the little components of TCP segments - 3way handshake, sequences etc.
TCP Connection Establishment
To use reliable transport services, TCP hosts must establish a connection-oriented session with one another. Connection establishment is performed by using a "three-way handshake" mechanism.
A three-way handshake synchronizes both ends of a connection by allowing both sides to agree upon initial sequence numbers. This mechanism also guarantees that both sides are ready to transmit data and know that the other side is ready to transmit as well. This is necessary so that packets are not transmitted or retransmitted during session establishment or after session termination.
Each host randomly chooses a sequence number used to track bytes within the stream it is sending and receiving. Then, the three-way handshake proceeds in the following manner:
The first host (Host A) initiates a connection by sending a packet with the initial sequence number (X) and SYN bit set to indicate a connection request. The second host (Host B) receives the SYN, records the sequence number X, and replies by acknowledging the SYN (with an ACK = X + 1). Host B includes its own initial sequence number (SEQ = Y). An ACK = 20 means the host has received bytes 0 through 19 and expects byte 20 next. This technique is called forward acknowledgment. Host A then acknowledges all bytes Host B sent with a forward acknowledgment indicating the next byte Host A expects to receive (ACK = Y + 1). Data transfer then can begin.
Positive Acknowledgment and Retransmission (PAR)
A simple transport protocol might implement a reliability-and-flow-control technique where the source sends one packet, starts a timer, and waits for an acknowledgment before sending a new packet. If the acknowledgment is not received before the timer expires, the source retransmits the packet. Such a technique is called positive acknowledgment and retransmission (PAR).
By assigning each packet a sequence number, PAR enables hosts to track lost or duplicate packets caused by network delays that result in premature retransmission. The sequence numbers are sent back in the acknowledgments so that the acknowledgments can be tracked.
PAR is an inefficient use of bandwidth, however, because a host must wait for an acknowledgment before sending a new packet, and only one packet can be sent at a time.
TCP Sliding Window
A TCP sliding window provides more efficient use of network bandwidth than PAR because it enables hosts to send multiple bytes or packets before waiting for an acknowledgment.
In TCP, the receiver specifies the current window size in every packet. Because TCP provides a byte-stream connection, window sizes are expressed in bytes. This means that a window is the number of data bytes that the sender is allowed to send before waiting for an acknowledgment. Initial window sizes are indicated at connection setup, but might vary throughout the data transfer to provide flow control. A window size of zero, for instance, means "Send no data."
In a TCP sliding-window operation, for example, the sender might have a sequence of bytes to send (numbered 1 to 10) to a receiver who has a window size of five. The sender then would place a window around the first five bytes and transmit them together. It would then wait for an acknowledgment.
The receiver would respond with an ACK = 6, indicating that it has received bytes 1 to 5 and is expecting byte 6 next. In the same packet, the receiver would indicate that its window size is 5. The sender then would move the sliding window five bytes to the right and transmit bytes 6 to 10. The receiver would respond with an ACK = 11, indicating that it is expecting sequenced byte 11 next. In this packet, the receiver might indicate that its window size is 0 (because, for example, its internal buffers are full). At this point, the sender cannot send any more bytes until the receiver sends another packet with a window size greater than 0.
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---know access-lists inside and out or you will die a slow painful death
---know that EIGRP does APPLE, IPX, IP no NOT RIP or IGRP OR OSPF!
---know ISDN legacy DDR - what is different about LEGACY DDR?
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Dialer List
--Allows a physical interface to be shared by many logical DDR interfaces, which provides flexibility in how you set up and use your DDR connections.
--Allows you to share multiple dialup interfaces to back up multiple primary WAN circuits.
--Do not need a separate dialer map command for each protocol/destination combination, which reduces the complexity of your DDR configuration.
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Note When you use a Basic Rate Interface (BRI) for a dial backup, neither of the B channels can be used while the interface is in a standby mode. In addition, when a BRI is used as a backup interface and the BRI is configured for Legacy DDR, only one B channel is usable. Once the backup is initiated over one B channel, the second B channel is unavailable. When the backup interface is configured for Dialer Profiles, both B channels can be used.
The main difference between the two is that DDR legacy associates dial details with a physical interface,
whereas DDR dialer profiles disassociate the dial configuration from a physical interface,
allowing a great deal of flexibility. The concepts behind DDR legacy apply to DDR dialer
profiles as well, but DDR legacy is a little less detailed.
---VLAN advantages
---arp disabled? do a frame-relay map
---hubs and switches: how they do collision detection?
---Telnet access-list allow, deny rest
---frame relay dlci, map when to use
---hex to binary
---protcols at which layers - UDP, TCP - SNMP, DHCP, SMTP ... | |
| npo3po 2004-02-23, 1:21 am |
| Dali pretty much summed it up, i'd go with the 801, i failed it as well on the first attempt(taking it again this thursday), it's not an easy test, and it shouldn't be, but if you study hard and harder you should be alright, focus on the details. It's all about the details with the 801.
buy your self like 400+ index cards, and start building a bank of questions to quiz yourself on daily!
take care and good luck.
Amir | |
| Joe Dali 2004-02-23, 3:27 pm |
| As I sit here reading Odom, I have lost count of how many times I said to myself "hey this was on the test."
If you want to pass 801, this is required reading ... Now I know why I got so many questions on Legacy DDR, its all here in odom ... great book. Concise, easy to read. Better than Lammle, but still get Lammle for the hell of it. He needs his reported $2 million monthly royalties ... | |
| Chammi 2004-02-24, 3:39 am |
| Thanks guys - I really appreciate your help.
Im still going to think hard as to whether to do the 2exam route or the single exam route?
Sunny | |
| smrkdown 2004-02-24, 9:31 am |
| Dali,
What is the title of the book you are using? It sounds interesting. Update us on your next testing experience. Good Luck. | |
| Joe Dali 2004-02-24, 8:00 pm |
| Wendell Odom's Cisco Press 640-801, $59.99 double deal book set.
If anyone wants to buy mine its for sale. |
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