In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hardware and computer software.
A network can consist of two computers connected together on a desk or it can consist of many smaller network connected together to form a bigger network across a continent.
Algorithm Used by Group Policy to Detect Slow Network Links
Group Policy can detect a slow network connection by using an algorithm. The
algorithm that Group Policy uses to determine whether a link should be
considered slow is as follows:
1. The client computer that is attempting to process Group Policy sends a zero
byte file to the authenticating domain controller, or server, which then
returns the file to the client. The client measures the time that it takes for the
file to complete the roundtrip, and if it is less than ten milliseconds, the
client assumes a fast...
Chapter summary: Bridges selectively relay packets between network segments, depending on their data-link layer destination addresses; bridges maintain a single broadcast domain and create separate collision domains; switches improve on the function of bridges by forwarding packets only to their destination systems; switches reduce the collisions on a network and increase the bandwidth available to each computer;...
Explain the structure IP addressing and demonstrate the ability to convert between 8-bit binary and decimal numbers. Given an IPv4 address, classify by type and describe how it is used in the network Explain how addresses are assigned to networks by ISPs and within networks by administrators Determine the network portion of the host address and explain the role of the subnet mask in dividing networks. Given IPv4 addressing information and design criteria, calculate the appropriate addressing components.
Explanation: Point-to-Point Protocol (PPP) provides router-to-router and host-network connections over
synchronous and asynchronous circuits. PPP was designed to work with several network layer protocols,
including IP and IPX. It also has built in security features such PAP (Password Authentication Protocol) and
CHAP (Challenged Handshake Authentication Protocol).
Thí stydy guide will help you to prepare for microsoft exam 70-215, installing, Configuring, and Administering Microsoft Windows 2000 server. Exam topics include installing Win2K server, resource access, hardware device & drivers, Storage use, Network connections, and security.
Root of Trust in a PC
Operations or actions based on the TPM have measurable trust.
Flexible usage model permits a wide range of actions to be defined.
Doesn’t Control PC (About DRM)
User still has complete control over platform. It’s OK to turn the TPM off (it ships disabled).
User is free to install any software he/she pleases.
Objectives: Configure a Basic Network Device, Verify and Test Network Connectivity. Background/Scenario: Cisco switches have a special interface, known as a switch virtual interface (SVI). The SVI can be configured with an IP address, commonly referred to as the management address that is used for remote access to the switch to display or configure settings.
The ping command is a good tool for troubleshooting Layers 1 though 3 of the OSI model and
diagnosing basic network connectivity. Using ping sends an ICMP packet to the specified device
(workstation, server, router or switch) and then waits for a reply. The IP address or host name can be
pinged. In order to ping the host name of a router, there must be a static host lookup table in the
router or a DNS server for name resolution to IP addresses.
What does a typical BCS network look like? Most installations today have a dedicated
BCS network with centralized control via an operator’s terminal in the facility manager’s
office. There is no Internet (or LAN) connection, and thus no IT threat. However, the
trend today is toward greater connectivity to enable new services, convenience, and
savings on infrastructure costs. Newer buildings have network connections to the Inter-
net. But even so, most BCS networks still have few resources that are of value to the
Taking the network scenario of Figure 1, there will be web interfaces (routers and serv-
ers), BACnet/IP controllers (connected to interesting devices that are network accessible),
and operator workstations that may have vulnerable OS as well as configuration files and
other interesting data and resources.
The following table is adapted from a Drexel report on network security [Eisenstein et al.,
2003a] and lists known IT threats to a BACnet network connected to the public Internet.
Unlock the secrets of the Terminal and discover how this powerful tool solves problems the Finder can’t handle. With this handy guide, you’ll learn commands for a variety of tasks, such as killing programs that refuse to quit, renaming a large batch of files in seconds, or running jobs in the background while you do other work.
Get started with an easy-to-understand overview of the Terminal and its partner, the shell. Then dive into commands neatly arranged into two dozen categories, including directory operations, file comparisons, and network connections.
However, in many multi-building installations where a central control capability is de-
sired, or where there is some outlying equipment to monitor, it is more and more com-
mon to connect the separate BCS networks using existing cables and IP protocol. This
connection may be entirely confined behind a corporate firewall, but more likely includes
the public Internet . How are such network connections secured? If they are secured, it is
most commonly done by using virtual private networking (VPN) technology from build-
ing firewall to building firewall across the Internet .
Objectives: Test Network Connectivity Using Ping, Trace a Route to a Remote Server Using Windows Tracert, Trace a Route to a Remote Server Using Web-Based and Software Tools, Compare Traceroute Results.
Chapter 2 objectives: Describe the purpose of a WAN, describe WAN operations, describe WAN services available, compare various private WAN technologies, compare various public WAN technologies, select the appropriate WAN protocol and service for a specific network requirement.
This chapter includes contents: Types of remote network connections, public switched telephone network (PSTN), modems, modem communications, configuring a modem, Virtual Private Network (VPN) communications,...
Chapter 3 - Network connections. Chapter summary: Use the Network And Dial-Up Connections window to manually install and configure the basic Windows 2000 networking components; use the Local Area Connection Properties dialog box of a network interface adapter to install, remove, and configure the TCP/IP networking components for that specific network interface adapter; use the Internet Protocol (TCP/IP) Properties dialog box to configure basic and advanced TCP/IP properties.
we expand networks to include new services, we must continually strive
secure them. It is not an inherently easy thing to do.
First, we need to balance growth and total security without duplicating
operations. Second, our networks need to support the mobility of our workforces
as the number of remote sites that are connected continues to multiply.
finally, while one cannot predict what will be needed for tomorrow, we
build in the flexibility to adapt to whatever unknown priorities may
the near future....