The document discusses fire alarm intelligibility, including:
- Defining intelligibility as the capability of being understood and discussing factors that impact speech comprehension.
- Tracing the history of intelligibility requirements in NFPA 72 fire codes from 1996 to present.
- Explaining factors that influence intelligibility like sound pressure levels, echo, reverberation, and room characteristics.
- Providing guidelines for designing intelligible systems through software modeling, speaker selection, placement and spacing, and sound pressure levels.
- Discussing testing protocols according to NFPA 72 and ISO 7240-19 standards using word lists, rhyme tests, and digital speech meters.
This document provides an analysis of the banking industry and a comparison of Regions Bank and PNC Bank. It discusses the characteristics of the retail banking industry, the business strategies of Regions and PNC, how they recognize earnings and accounting issues. It also analyzes the risks and profitability between the two banks by examining their loan portfolios, deposit structures, and efficiency. The document concludes by looking at future prospects, key milestones, and first quarter 2012 results for Regions which showed broad-based asset quality improvement.
Quest_Software_Best_Practices_for_Exchange_2007Balaji Ravi
油
This document provides best practices for planning and executing a migration from earlier versions of Exchange to Exchange Server 2007. It emphasizes the importance of a thorough pre-migration assessment to understand the existing Exchange environment. The assessment should answer questions about the Windows, infrastructure and Exchange environments. It also discusses archiving mailboxes before migrating to reduce migration data size. The migration process outlined includes deploying Exchange 2007, establishing coexistence, migrating mailboxes and decommissioning the source system. Ongoing management priorities for the new Exchange 2007 environment like availability and information management are also addressed.
Upgrading_and_Migrating_to_Exchange_Server_2007_and_Windows_2008Balaji Ravi
油
This document provides an overview of upgrading and migrating to Exchange 2007 and Windows 2008. It discusses migration paths from previous versions of Exchange and Windows, planning considerations, and a case study of achieving site resiliency using Exchange 2007 SP1 and Windows 2008. The presentation was given by Dejan Foro, an Exchange MVP, and covers introduction, migration paths, planning, a site resiliency case study, tips and tricks, additional resources, and Q&A.
This document provides an overview of routing concepts including addressing, routing functions, packet forwarding, virtual channels, and routing types. It discusses addressing structures and characteristics, how routers use addresses and routing tables to forward packets to destinations, and how routing tables are updated dynamically or statically. Virtual channels are also introduced as an alternative to datagram forwarding where connections are established and packets follow dedicated paths. The summary concludes with a high-level comparison of centralized and distributed routing algorithms.
The document provides an overview of using LDAP (Lightweight Directory Access Protocol) directory services on Linux. It discusses the need for LDAP, provides an overview of LDAP basics like its data model and benefits. It also covers setting up and tuning OpenLDAP on Linux, integrating LDAP with applications like mail routing and authentication, and describes LDAP search filters.
This document provides an overview of cryptography from classical to modern times. It discusses the history and evolution of cryptographic techniques including substitution ciphers, transposition ciphers, codes, public key cryptography, digital signatures, and key distribution problems. The document also summarizes the four main topics that will be covered in the course: the history and foundations of modern cryptography, using cryptography in practice, the theory of cryptography including proofs and definitions, and a special topic in cryptography.
Le document semble contenir des symboles et des caract竪res sans signification claire. Il ne pr辿sente pas d'informations coh辿rentes ou compr辿hensibles. Par cons辿quent, aucun r辿sum辿 substantiel ne peut 棚tre fourni.
This document is a lecture on C pointers and arrays. It discusses that pointers store the address of a variable rather than the variable's value. Arrays are similar to pointers in C, as an array variable is a constant pointer to the first element. The lecture warns that C does not check array bounds or initialize variables, so pointers can cause bugs if not used carefully. It provides examples of pointer arithmetic and comparing pointers.
The document discusses conventional encryption techniques. It begins with an introduction to cryptography and describes the basic model of conventional encryption which uses a shared secret key for encryption and decryption. It then discusses some classical encryption techniques like the Hill cipher, polyalphabetic cipher, transposition ciphers, and rotor machines. It also covers modern symmetric key algorithms like the Data Encryption Standard (DES) and Blowfish. The document emphasizes that secure key distribution is a challenge for conventional encryption techniques. It then moves to the topic of public key cryptography which solves the key distribution problem.
ESCC is a new tweakable narrow-block mode of operation for disk encryption that is an extension of the Substitution Cipher Chaining mode (SCC). Unlike SCC, ESCC is resistant to known attacks on SCC. ESCC uses a tweak, sector ID, and expanded key to encrypt each 512-byte sector separately. It propagates errors to further blocks for added security. The designers claim ESCC provides security comparable to encrypting each block with a unique key while maintaining performance comparable to or better than existing disk encryption modes.
This document provides guidance on securing a wireless local area network (WLAN). It begins by defining the main security options for WLANs - WEP, WPA, and WPA2. It recommends against using WEP and states that WPA2 with CCMP encryption provides the best security. The document then provides a concise overview of each security standard and protocol. It aims to clearly explain the essential options and recommendations for securing a WLAN in just a few sentences.
The document discusses the history of cryptography and mentions that substitution ciphers can be broken using frequency analysis of the letters in the encrypted text. It provides an example of analyzing letter frequencies in an encrypted passage to deduce that it was encrypted with a simple substitution cipher. The document also notes that while substitution ciphers have a huge key space, they are trivial to crack using statistical analysis of letters.
Cryptography is a process that scrambles information to make it unreadable except by authorized parties. It has four basic parts: plaintext, ciphertext, cryptographic algorithms, and keys. Public key cryptography uses two keys - a private key that remains secret, and a public key that can be openly distributed. This allows secure transmission without pre-sharing secret keys. While public key cryptography has advantages for Internet use, it has disadvantages of slower transmission speeds and larger key sizes compared to symmetric cryptography.
Microsoft performed tests to evaluate the performance of Exchange Server 2003 running on virtual machines hosted by VMware ESX Server 3.1 compared to physical machines. Key findings include:
1) Virtual machines saw performance reductions of 24-29% compared to physical machines.
2) Scaling out by adding more single-processor virtual machines provided near-linear performance gains, with 4 VMs supporting over 3x the users of 1 VM.
3) Scaling up virtual machines by adding a second virtual CPU provided a 69% performance gain over a single CPU virtual machine.
Quest_Software_Best_Practices_for_Exchange_2007Balaji Ravi
油
This document provides best practices for planning and executing a migration from earlier versions of Exchange to Exchange Server 2007. It emphasizes the importance of a thorough pre-migration assessment to understand the existing Exchange environment. The assessment should answer questions about the Windows, infrastructure and Exchange environments. It also discusses archiving mailboxes before migrating to reduce migration data size. The migration process outlined includes deploying Exchange 2007, establishing coexistence, migrating mailboxes and decommissioning the source system. Ongoing management priorities for the new Exchange 2007 environment like availability and information management are also addressed.
Upgrading_and_Migrating_to_Exchange_Server_2007_and_Windows_2008Balaji Ravi
油
This document provides an overview of upgrading and migrating to Exchange 2007 and Windows 2008. It discusses migration paths from previous versions of Exchange and Windows, planning considerations, and a case study of achieving site resiliency using Exchange 2007 SP1 and Windows 2008. The presentation was given by Dejan Foro, an Exchange MVP, and covers introduction, migration paths, planning, a site resiliency case study, tips and tricks, additional resources, and Q&A.
This document provides an overview of routing concepts including addressing, routing functions, packet forwarding, virtual channels, and routing types. It discusses addressing structures and characteristics, how routers use addresses and routing tables to forward packets to destinations, and how routing tables are updated dynamically or statically. Virtual channels are also introduced as an alternative to datagram forwarding where connections are established and packets follow dedicated paths. The summary concludes with a high-level comparison of centralized and distributed routing algorithms.
The document provides an overview of using LDAP (Lightweight Directory Access Protocol) directory services on Linux. It discusses the need for LDAP, provides an overview of LDAP basics like its data model and benefits. It also covers setting up and tuning OpenLDAP on Linux, integrating LDAP with applications like mail routing and authentication, and describes LDAP search filters.
This document provides an overview of cryptography from classical to modern times. It discusses the history and evolution of cryptographic techniques including substitution ciphers, transposition ciphers, codes, public key cryptography, digital signatures, and key distribution problems. The document also summarizes the four main topics that will be covered in the course: the history and foundations of modern cryptography, using cryptography in practice, the theory of cryptography including proofs and definitions, and a special topic in cryptography.
Le document semble contenir des symboles et des caract竪res sans signification claire. Il ne pr辿sente pas d'informations coh辿rentes ou compr辿hensibles. Par cons辿quent, aucun r辿sum辿 substantiel ne peut 棚tre fourni.
This document is a lecture on C pointers and arrays. It discusses that pointers store the address of a variable rather than the variable's value. Arrays are similar to pointers in C, as an array variable is a constant pointer to the first element. The lecture warns that C does not check array bounds or initialize variables, so pointers can cause bugs if not used carefully. It provides examples of pointer arithmetic and comparing pointers.
The document discusses conventional encryption techniques. It begins with an introduction to cryptography and describes the basic model of conventional encryption which uses a shared secret key for encryption and decryption. It then discusses some classical encryption techniques like the Hill cipher, polyalphabetic cipher, transposition ciphers, and rotor machines. It also covers modern symmetric key algorithms like the Data Encryption Standard (DES) and Blowfish. The document emphasizes that secure key distribution is a challenge for conventional encryption techniques. It then moves to the topic of public key cryptography which solves the key distribution problem.
ESCC is a new tweakable narrow-block mode of operation for disk encryption that is an extension of the Substitution Cipher Chaining mode (SCC). Unlike SCC, ESCC is resistant to known attacks on SCC. ESCC uses a tweak, sector ID, and expanded key to encrypt each 512-byte sector separately. It propagates errors to further blocks for added security. The designers claim ESCC provides security comparable to encrypting each block with a unique key while maintaining performance comparable to or better than existing disk encryption modes.
This document provides guidance on securing a wireless local area network (WLAN). It begins by defining the main security options for WLANs - WEP, WPA, and WPA2. It recommends against using WEP and states that WPA2 with CCMP encryption provides the best security. The document then provides a concise overview of each security standard and protocol. It aims to clearly explain the essential options and recommendations for securing a WLAN in just a few sentences.
The document discusses the history of cryptography and mentions that substitution ciphers can be broken using frequency analysis of the letters in the encrypted text. It provides an example of analyzing letter frequencies in an encrypted passage to deduce that it was encrypted with a simple substitution cipher. The document also notes that while substitution ciphers have a huge key space, they are trivial to crack using statistical analysis of letters.
Cryptography is a process that scrambles information to make it unreadable except by authorized parties. It has four basic parts: plaintext, ciphertext, cryptographic algorithms, and keys. Public key cryptography uses two keys - a private key that remains secret, and a public key that can be openly distributed. This allows secure transmission without pre-sharing secret keys. While public key cryptography has advantages for Internet use, it has disadvantages of slower transmission speeds and larger key sizes compared to symmetric cryptography.
Microsoft performed tests to evaluate the performance of Exchange Server 2003 running on virtual machines hosted by VMware ESX Server 3.1 compared to physical machines. Key findings include:
1) Virtual machines saw performance reductions of 24-29% compared to physical machines.
2) Scaling out by adding more single-processor virtual machines provided near-linear performance gains, with 4 VMs supporting over 3x the users of 1 VM.
3) Scaling up virtual machines by adding a second virtual CPU provided a 69% performance gain over a single CPU virtual machine.