CompTIA SY0-201 Security+ Exam Guide phần 4 pptx

... covered. Invisible ink placed on a document hidden by innocuous text is an example of a steganographic message. Another example is a tattoo placed on the top of a person’s head, visible only when ... SY0 - 201 Leading the way in IT testing and certification tools, www.testking.com - 44 - features of PGP is its ability to use both symmetric and asymmetric encryption methods, ac...

Ngày tải lên: 10/08/2014, 10:21

... in IT testing and certification tools, www.testking.com - 1 - CompTIA SY0-201 Security+ Exam Guide Version 2.0 SY0 - 201 Leading the way in IT testing and ... RAS 14. VPN 15. Intrusion Detection Systems 16. Network Access Control 17. Network Monitoring/Diagnostic 18. Mobile Devices v. Media 1. Coaxial Cable 2. UTP/STP 3. Fiber 4. Ungu...

Ngày tải lên: 10/08/2014, 10:21

... financial institutions, for example, require that certain security measures be taken. Other standards may be set by the organization to meet its own security goals. Guidelines are SY0 - 201 ... - 18 - recommendations relating to a policy. The key term in this case is recommendation— guidelines are not mandatory steps. Procedures are the step-by-step instructions on how to implement...

Ngày tải lên: 10/08/2014, 10:21

... blocks. SHA-3 84 also used 64- bit words instead of SHA-1’s 32-bit words. It uses six 64- bit words to produce the 2 84- bit hash value. SHA-512 SHA-512 is structurally similar to SHA-3 84. It will ... in a secure manner. It might be easy to exchange a 4- bit key such as b in hex, but exchanging the 128-bit key 4b3 640 2c572 747 2d5571373d22675b4b is far more difficult to do securel...

Ngày tải lên: 10/08/2014, 10:21

... certification tools, www.testking.com - 54 - Instead of being revoked, a certificate can be suspended, meaning it is temporarily put on hold. If, for example, Bob is taking an extended vacation ... precautions and procedures the outsourced CAs provide, and the surrounding legal issues need to be examined before this type of agreement is made....

Ngày tải lên: 10/08/2014, 10:21

... Routers operate by examining each packet, looking at the destination address, and using algorithms and tables to determine where to send the packet next. This process of examining the header ... networks is the Ethernet protocol, and the most common connector is the RJ -45 connector. Figure 8-1 shows a RJ -45 connector (lower) compared to a standard telephone connector (upper). Additio...

Ngày tải lên: 10/08/2014, 10:21

... Unguided Media Electromagnetic waves have been transmitted to convey signals literally since the inception of radio. Unguided media is a phrase used to cover all transmission media not guided ... ability to examine the data traffic the host was generating and receiving. Most HIDS focus on the log files or audit trails generated by the local operating system. On UNIX systems, the exam...

Ngày tải lên: 10/08/2014, 10:21

... in the interest of promoting better security for everyone. Information is also gathered through examination and forensic analysis, often after a major incident has already occurred and information ... process: 1. Reconnaissance (also known as profiling) 2. Scanning 3. Researching vulnerability 4. Performing the attack Reconnaissance The attacker can gather as much information abou...

Ngày tải lên: 10/08/2014, 10:21

... or game, for example. Once it has been copied and is inside the system, the Trojan will perform its hidden purpose with the user often still unaware of its true nature. A good example of a ... connections, these will not limit all types; the best method is to limit access to TCP ports 139 and 44 5 to only trusted users. Sniffing The group of protocols that make up the TCP/IP suite...

Ngày tải lên: 10/08/2014, 10:21

... motion-compensated blocks, or macroblocks. H.2 64 provides the option of motion compensating 16 × 16-, 16 × 8-, 8 × 16-, 8 × 8-, 8 × 4- , 4 × 8-, or 4 × 4- pixel blocks within each macroblock. The ... CIF that were supported by H.261, there are SQCIF, 4CIF, and 16CIF. SQCIF is approximately half the resolution of QCIF. 4CIF and 16CIF are 4 and 16 times the resolution of CIF, res...

Ngày tải lên: 12/08/2014, 16:21