Introduce of 350-001，70-290，70-536

Introduce of 350-001，70-290，70-536

1、Exam Number/Code: 352-001

Exam Name: 350-001 Value Pack

Our technical expert highly recommend that you buy this ” 352-001 written exam+ 352-001 -Lab exam” value pack. To be certified as a CCIE, you must pass two sequence of exams: written exam and Lab exam respectively.

In order that candidates will better grasp the CCIE knowledge, our technical experts outline the examination topics and compile a set of CCIE Preparation kits, which not only covers all the main and important CCIE knowledge, but also builds the Q&As and Labs for corresponding exam separately. With mastering both of them, you will surely have a thorough understanding of CCIE knowledge. Value pack is surely the best choice for you to pass  352-001 with high scores.

But here we must notice one thing: Regarding this Value Pack, the guarantee policy will only be available for 350-001 written exam but not cover 350-001-Lab exam. If you buy the Value Pack but failed 350-001 written exam, we will carry out the guarantee policy strictly, however, we do not supply pass guarantee for 350-001-Lab exam because of its particularity(Please refer to the description of 350-001-Lab).

2、Exam Number/Code: 70-290

Exam Name: 70-290 Value Pack

Our technical expert highly recommend that you buy this “70-290 Q&A+Preparation Labs+70-290 Study Guide” value pack. In order that candidates will better grasp the MCSE 2003 Security knowledge, our technical experts outline the examination topics and compile a set of MCSE 2003 Security Preparation Labs, which not only covers all the main and important MCSE 2003 Security knowledge, but also adds some sample questions and analysis of related certification. After you master all the labs, and learn of 70-290 Q&A, you will surely have a thorough understanding of 70-290 knowledge. Value pack is surely the best choice for you to pass 70-290 with high scores.

3、Exam Number/Code: 70-536

Exam Name: 70-536 Value Pack

Our technical expert highly recommend that you buy this “70-536 Q&A+Preparation Labs” value pack. In order that candidates will better grasp the MCPD knowledge, our technical experts outline the examination topics and compile a set of MCPD Preparation Labs, which not only covers all the main and important MCPD knowledge, but also adds some sample questions and analysis of related certification. After you master all the labs, and learn of 70-536 Q&A, you will surely have a thorough understanding of 70-536 knowledge. Value pack is surely the best choice for you to pass 70-536 with high scores.

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Pass4sure 70-631 exam practice

Public Key Infrastructure Fundamentals 70-642 70-271 70-445 70-237
Computer networks are no longer closed systems in which a user’s mere presence on the network can serve as proof of identity. In this age of information interconnection, an organization’s network might consist of intranets, Internet sites, and extranets-all of which are potentially susceptible to access by unauthorized individuals who intend to maliciously view or alter the organization’s digital information assets.
There are many potential opportunities for unauthorized access to information stored on networks. A person can attempt to monitor or alter information as it crosses the network, including e-mail messages, electronic commerce transactions, and file transfers. A thief who steals a laptop computer can attempt to access confidential documents stored on the computer. An attacker might attempt to impersonate a legitimate user to gain access to information that would not otherwise be authorized.
A well-planned PKI can reduce the likelihood of each of these common attacks. As a security administrator, you must understand the fundamentals of PKI, and be able to deploy a Windows Server 2003 Certificate Services infrastructure.

Cryptography and Encryption
Cryptography is essential for the secure exchange of information across intranets, extranets, and the Internet. From a technical point of view, cryptography is the science of protecting data by mathematically transforming it into an unreadable format, otherwise known as encryption. To a business, cryptography is a means to reduce the likelihood of a costly security compromise by providing authentication, confidentiality, and data integrity.
Network encryption comes in two main varieties: shared key encryption and public key encryption. Shared key encryption requires both the sender and the recipient of an encrypted message to have a shared secret-a password that can be used to encrypt and decrypt the message. Shared key encryption is easy to understand, but it is difficult to implement on a large scale. After all, to allow secure communication between 1,000 employees at a company would require about 1 million passwords to be exchanged, because any two users who wanted to communicate would need to exchange a unique password.
For example, if Sam wants to send an encrypted electronic message to Toby, Sam first walks over to Toby and whispers a password in his ear. Then, when Toby receives the electronic message, Toby decrypts it with the password. As long as nobody else knows the password, Sam can be sure that the contents of the message are private.
The second common network encryption mechanism is public key encryption, also known as asymmetric key encryption. Public key encryption uses one key to encrypt a message, and a second, related key to decrypt the message. These two keys form a key pair. One of these keys is kept private, and the other key can be shared publicly (hence the name, public key encryption).
For example, if Sam wants to send an encrypted message to Toby, Sam uses Toby’s public key to encrypt the message. When Toby receives the message, Toby uses his private key to decrypt it. Only Toby’s private key can be used to decrypt a message encrypted with his public key, so Sam can be sure that nobody else was able to view the contents of the message.
There’s another interesting way to use public key encryption: digital signatures. If Sam wants to prove to Toby that Sam, and not somebody else, sent the message, Sam can use Sam’s own private key to encrypt the message. After Toby receives it, Toby needs to use Sam’s public key to decrypt the message. If it decrypts properly, Toby can be certain that Sam’s private key was used to encrypt it and that the message hadn’t changed since Sam sent it. Of course, encryption takes a great deal of processing power, so Sam would probably choose to encrypt a short hash of the message instead of the entire message, and append the hash onto the end of the message. That would be sufficient to prove that Sam sent the message and that it hadn’t been modified in transit. NS0-201 70-643 70-631

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Pass4sure cisco 642-373 exam testing

Group Policy 70-290 117-201 MB2-632 70-649
Group Policy objects can be configured to automatically install Windows Installer packages on computers. Service packs include a Windows Installer package, making it simple to use a Group Policy object to deploy a service pack.
Service packs, more than any other type of update, require extensive testing and pilot deployments because of the extensive changes they make. Although SUS is an excellent way to distribute frequently released security updates to a large number of client computers, you cannot use a single SUS server to stage a pilot deployment to a small number of computers in your organization. Fortunately, you can use Group Policy objects to distribute service packs directly.
Off the Record As of the time of this writing, the current version of SUS does not provide any ability to control which clients receive updates. However, you could create separate SUS servers for pilot and production deployments, and approve updates on the production SUS server only after they have been proven on the pilot SUS server. You could then use Group Policy objects to point different clients at the production and pilot SUS servers.
There are some distinct advantages to using a Group Policy object rather than the Automatic Updates client to distribute service packs. Specifically, by using Group Policy objects, you can deploy a service pack only to computers in specific sites, domains, and organizational units. Additionally, you can use permissions and Windows Management Instrumentation (WMI) filtering to control which computers can apply a GPO on an even more granular level.
After you assign the service pack package, Windows Installer installs the service pack automatically when users start their computers. Users are not presented with a choice to install the service pack. Only a network administrator or someone who is logged on to a local computer as a member of the Administrators group on that computer can remove the assigned software.
After a package has been added to the Software Installation node of a GPO, you can choose to remove or deploy it for troubleshooting purposes. If a service pack installation fails to deploy successfully, you can redeploy it by right-clicking the package, clicking All Tasks, and then clicking Redeploy Application. 70-293 70-431 70-236 642-373
You can remove the package from the GPO by right-clicking the package, clicking All Tasks, and then clicking Remove. The Remove Software dialog box will appear. To uninstall the service pack, click Immediately Uninstall The Software From Users And Computers. To leave the service pack installed on computers that have already received it, click Allow Users To Continue To Use The Software, But Prevent New Installations. Microsoft updates support a standard set of command-line parameters to simplify the deployment of updates by using scripts. Use the /quiet (formerly /q) parameter to install an update silently. When chaining updates, use the /norestart (formerly /z) parameter to prevent the computer from automatically restarting.
The Automatic Updates client can be configured by using GPOs linked to Active Directory, to the local GPO, or to the registry.
SUS requires that IIS be installed on the local computer, and that the Web site be configured to use the default port 80.
Both SUS and the Automatic Updates client store event information in the System event log.
Service packs include a Windows Installer package that can be used to deploy the service pack by using a GPO. This provides a simple way to install the service pack on a limited number of computers during a pilot deployment.

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Pass4sure Microsoft 70-237 exam guides

Considerations for Evaluating Your Environment 70-431 70-646 70-236
When establishing an authentication strategy for your organization, you must become familiar with your current environment, including the structure of your organization; the users, computers, and services in your organization that require authentication; and the applications and services that are in use. This will help you to understand the requirements and constraints of your organization.
When evaluating your environment, identify the following:
The number of domain controllers in your organization. Ensure that there are enough domain controllers to support client logon requests and authentication requests while meeting your redundancy requirements. A sufficient number of domain controllers will ensure that a large volume of authentication requests will not result in authentication failures, even if a domain controller is offline because of hardware or network failures.
The type of network connectivity between site locations in your organization. Ensure that clients in remote sites are connected well enough to authenticate to domain controllers located in main sites. If connectivity is an issue, consider installing domain controllers in sites that might have logon problems because of slow or unreliable links. 642-415 642-373 70-642
Planning Everyone is always concerned about whether they have enough bandwidth, but it’s latency that’s more likely to cause authentication problems across wide area network links. Authentication requires very little bandwidth. However, packets must go back and forth across the link several times. If latency causes a significant delay for each round trip, authentication will seem slow.
The number of certification authorities (CAs) that are available in your organization and their locations. Ensure that you have enough CAs to support the anticipated number of certificate requests.
Guidelines for Creating a Strong Password Policy
Encryption limits your vulnerability to having user credentials intercepted and misused. Specifically, password encryption is designed to be extremely difficult for unauthorized users to decrypt. Ideally, when a strong password is used, it should take an attacker months, years, or decades to identify the unencrypted password after the attacker captures the encrypted or hashed password. During that time, the password should have been changed—making the unencrypted password now useless.
In contrast, weak passwords can be identified in a matter of hours or days, even when they have been encrypted. Encryption cannot protect against passwords that are easily guessed, because weak passwords are vulnerable to dictionary attacks. Dictionary attacks encrypt a list of common passwords, and compare each possibility with the captured cyphertext. If the password appears in the password dictionary, the attacker will identify the password quickly. You can defend against this vulnerability by implementing a strong password policy.
Off the Record The best way to understand how effective dictionary attacks are is to grab a password cracking tool from the Internet and experiment with it on a test machine. I can’t point you to a specific tool, but they’re not hard to find. 70-271 70-445 70-237

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Pass4sure Cisco 640-801 Exam practice training

Understanding the Components of an Authentication Model 70-441 VCP-310 640-802
In this lesson, you will learn the meaning of the term authentication, and how it differs from authorization. You will understand that network authentication is similar in function to the common methods of authenticating people in the physical world. You will learn how to optimize the security of authentication in Windows Server 2003 environments while ensuring compatibility with every client that will access your network resources. Finally, you will explore the tools provided for troubleshooting authentication problems.
Network Authentication Systems
In order to authenticate a user on a network with some reasonable certainty that the user is who he or she claims to be, the user needs to provide two pieces of information: identification and proof of identity. In most networks, users identify themselves with a user name or an e-mail address. The way users prove their identity varies, however.
Traditionally, a password is used to prove a user’s identity. A password is a form of a shared secret. The user knows his or her password, and the server authenticating the user either has the password stored, or has some information that can be used to validate the password.
Passwords prove your identity because they are something you know. Other ways to prove your identity are with something you have or something you are. Many modern computer systems authenticate users by reading information from a smart card—something you have. Other computer systems are satisfied that you are who you claim to be only when you prove it with something you are. Biometrics can do this by scanning a unique part of your body such as your fingerprint, your retina, or your facial features. 190-848 350-001 156-915.65
Passwords can be guessed, and smart cards can be stolen. One form of authentication alone may not meet your organization’s security requirements. Multifactor authentication combines two or more authentication methods, and significantly reduces the likelihood that an attacker will be able to impersonate a user during the authentication process. The most common example of multifactor authentication is combining a smart card with a password. Typically, the password is required to retrieve a key stored on the smart card. Before you can authenticate to such a system, you must provide a password (something you know) and a smart card (something you have).
Note The examples in this book rely on using passwords alone for authentication. While this is one of the less secure ways to authenticate users, you probably don’t have smart cards or fingerprint readers connected to your computer. You almost certainly have a keyboard, though.
Storing User Credentials
The server that authenticates the user must be able to determine that the user’s credentials are valid. To do this, the server must store information that can be used to verify the user’s credentials. How and where this information is stored are important decisions to make when designing an authentication model.

The way the user credentials are stored can determine how difficult it is for an attacker to misuse the information and whether those user credentials can be migrated to a new authentication system in the future. Naturally, it is important that this information remains confidential. Instead of simply storing a list of user passwords on a server, and directly comparing the password provided by the user against the list, it’s common to store an encrypted or hashed version of the user password. If an attacker does gain access to the server’s copy of the user’s credentials, the attacker still needs to decrypt the contents before they can be used to impersonate a user. 642-642  350-018 640-801

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Eight Hot Jobs And The Certifications You Need To Get Them

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Pass4sure 117-202 exam answer question

Designing a WINS Replication Strategy 70-236 70-646 70-431 70-293
In designing your WINS infrastructure you must take into account the process of replicating
your WINS database from one WINS server to another WINS server located on
a different subnet. This is very important; you want users from a subnet to be able to
access resources located on a different subnet using NetBIOS-friendly names. This lesson
will show you how a WINS server can be selected as a push or pull partner, which
enables this replication to take place.
Creating a Replication Strategy
Once you have documented your WINS infrastructure and have determined the placement
of all of your WINS servers, routers, subnets, users, and so on, it’s time to create
a replication strategy to improve performance and to add fault tolerance to your enterprise
network. On smaller networks where only one or two WINS servers are needed,
a replication strategy is simple and effortless to create. On larger enterprise networks,
a lot of thought must be put into designing and implementing a replication strategy.
In the diagram, Subnet 1 contains a single WINS server named WS1 that services all client
computers on that subnet. When Client1-1 starts up, it registers all of the NetBIOS
information you learned earlier to the WINS database. All of the WINS-enabled client
computers in this subnet are configured to use WS1 as their primary WINS server.
When Client1-2 initiates a connection to \\client1-1, a name-resolution request is made
to the WINS server. The database is checked, and the IP address is returned. 70-649 MB2-632 642-812
Subnet 2 also has a WINS server, named WS2, which services all WINS-enabled workstations
on Subnet 2. When Client2-1 starts up, it too registers its NetBIOS information
to the WINS server, as do all WINS-enabled workstations in Subnet 2. But what would
happen if Client1-1 tried to access Client2-1 using NetBIOS name resolution? The router
in the diagram indicates that broadcast traffic would not pass through it, so NetBIOS
name resolution would have to occur in one of the two other ways you learned:
Lmhosts files or WINS. Let’s assume that there are no Lmhosts files configured for any
of the clients. When Client1-1 queries the WINS database on the WS1 server, there will
not be an entry for Client2-1, or for any other clients in Subnet 2 for that matter, in the
WINS database because Subnet 2 clients register all NetBIOS information to only the
WINS database on the WS2 server.
Securing Your WINS Infrastructure
Any time replication information from one server will traverse a network to reach
another server, you risk the possibility of interception of that data. Just as DNS zone
transfers are susceptible to this type of attack, so is WINS replication data.
Because WINS servers may be exposed to the Internet just like DNS servers are, security
should be of concern. Replication traffic between WINS servers across a public network
such as the Internet can be intercepted. NetBIOS names and IP addresses of your
servers and workstations can be made available to unauthorized personnel. As with
DNS, there are a couple of options you can use to protect your WINS replication data:
Encryption using Internet Protocol Security (IPSec ) 70-620 jn0-562
Encryption using a Virtual Private Network (VPN ) 117-201 117-202
As a network administrator, it is very important that your design always includes security
measures to protect the information and network resources of your company. All
WINS servers should be secured by cipher-locked doors, and access should be
restricted to authorized personnel using Active Directory directory services.

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Pass4sure cisco 642-415 exam practice engine

Designing a WINS Server Placement Strategy 156-215.1 70-643 NS0-201
Your goal, when designing a WINS strategy for your network infrastructure, is to have
the WINS service available to client workstations when they need it. Availability is at
risk when there is only one WINS server configured to support a large number of users.
If that server should fail, all of the users will now need to resolve NetBIOS names using
one of the other methods covered earlier: Lmhosts files or broadcasts. In situations in
which a slow link exists between two subnets, it is highly recommended that a WINS
server be placed in both subnets to maximize performance of client name-resolution
requests.
Just as much thought had to go into deciding where to place your DNS servers, you
can see that placing your WINS servers in the right location can also influence performance.
For example, a remote site that has several thousand users may warrant placing
a WINS server there to avoid the prospect of sending the traffic generated from name
registrations over a 128Kb frame relay connection. Once again, your network topology
diagrams are critical in making such decisions.
Fault Tolerance 70-237 70-445 70-271
When designing your WINS infrastructure, you should consider the possibility of something
going wrong—because it usually does. Having only one WINS server on a routed
network, regardless of how small the network is, can create problems if a WINS server
unexpectedly crashes due to hardware failure or is inadvertently shut down for maintenance
by a junior network administrator who is not aware that the server is running
WINS. By placing secondary WINS servers throughout your network infrastructure, you
reduce the effects of one server being unavailable for your clients. If cost is a factor
preventing you from implementing this, Lmhosts files configured with #PRE-tag entries
for critical servers are a good way of ensuring that clients can access network resources
in the event of a downed router or WINS server.
Non-Routed Networks
On a small LAN with one WINS server, you will not see as much of a problem with a
WINS server crashing as you would in a routed network. Users on the LAN would be
able to access all network resources located on the LAN using broadcast requests.
However, they may see a noticeable degredation in performance on low-bandwidth
networks.
Routed Networks
On a routed network, where users on a remote segment rely on the WINS server across
the router to perform NetBIOS name resolution, a WINS server that is made unavailable
could prevent users from doing their jobs. For example, all applications that relied
on NetBIOS name resolution would not function. Access to servers and printers may
not be possible for all remote users. Another possible problem could arise if the router
connecting to the subnet containing the WINS server failed. In designing your WINS
infrastructure, all of these scenarios must be considered. 70-642 642-373 642-415

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Pass4sure cisco 642-533 exam demo download

WINS Database 70-299 70-541 XK0-002 70-536
The WINS database uses the Extensible Storage Engine (ESE) to operate. This is the
same engine used by Active Directory directory service, Microsoft Exchange, and many
other Windows components. ESE is built on JET (Joint Engine Technology). Most database
programs such as Microsoft SQL Server, Oracle, and Sybase allow transactions to
first be written to a log file before being written to the database file. This improves
performance because input/output (IO) to a file can be done quickly; subsequent
transactions can be written to the area of the database where the data should be stored.
ESE also separates log files and transactions to optimize performance.
For example, if a WINS-enabled client is booted, the client will register its name and IP
number to the WINS server. The WINS server will write this transaction to a log file
immediately. Later, when the processor is idle, transactions will be permanently written
directly to the database. There are a couple of advantages to this methodology:
Improved performance 646-230 642-533
Fault tolerance 70-272 70-284 220-602
The improved performance has already been demonstrated, but how is fault tolerance
gained in this example? Because all transactions are written to a log file first, a harddisk
crash of the database file could easily be restored from a backup tape combined
with the log files you have stored on a different drive or tape. This would allow you to
bring the server back to the point of failure. That is, transactions could be restored right
up to the point when the crash occurred if you restored your WINS database backup
and the current log files.
Now that you have had a lesson in how most databases work, let’s look at the WINS
database.
WINS Database Files
WINS uses the JET database format to store data in five different file types:
Log Files As you learned earlier, transactions are stored in log files. These files
begin with the letter “J” followed by a decimal number if the log file is a new
transaction, for instance, J10.log. If a log file becomes full, it is renamed with a
hexadecimal number appended to the previous name, such as J100000F.log. Then,
a new log file with the original filename is created.
Log files can grow quickly. As you learned in your earlier brief database lesson,
writing to log files increases speed and efficiency of data storage as well as providing
for recovery in case of a failure or crash. Log files should not be deleted
until a backup of the WINS database has occurred.
After all, once the database has been backed up, there is no reason to keep a copy
of the log files because the transactions have already been posted to the database
and backed up to tape or another media. If, however, the database crashes and
there is no backup of the log files, losing the database would mean losing the files
to recover. If you do not have a software or hardware redundant array of independent
disks (RAID) system in place, you would be able to return the system only to
the point of your last backup. All transactions that occurred between that backup
and the crash would be lost.
Checkpoint files Checkpoint files are used during a recovery process. These
files indicate the location of the information that was successfully written from the
transaction log files to the database file.
Wins.mdb The WINS server database file contains two tables: the IP address-toowner
ID mapping table and the name-to-IP address mapping table.
Winstmp.mdb This is a temporary file created by the WINS server service to aid
in index maintenance. 70-630 640-801 70-297
Res# .log Reserved log files are used if your server runs out of disk space and
cannot create additional transaction log files. The server places outstanding transactions
into these reserved log files, and the WINS service shuts down and logs an
event to Event Viewer.

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About CCDE Certification Exams Training Materials

About CCDE Certification Exams Training Materials

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