Managed s.
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This document discusses port configuration and security features on a network. It allows the user to control the speed, priority, and enable/disable status of each individual port. It also describes half duplex, full duplex, and auto negotiation settings. Additional features covered include double VLAN, private VLAN, DHCP snooping, BPDU messages, and spanning tree root guard.
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A router forwards data packets between computer networks to create an internetwork. It reads address information to determine a packet's destination and uses its routing table to direct the packet through networks until it reaches its destination node. A switch receives messages and transmits them only to the intended device, making it more intelligent than a hub which broadcasts to all devices. Common networking protocols include TCP/IP for addressing and transporting data, DNS for domain names, and HTTP/HTTPS for web protocols. Ethernet cables like Cat5e and Cat6 can support speeds up to 1 Gbps and 10 Gbps respectively. The document also discusses WiFi versions and configurations, powerline networking, firewalls, and network-attached storage (NAS).
Tech Blast: Networks
Presented at the NLC Tech Rodeo on the campus of Doane College in Crete, NE 26-28 June 2012.
http://nlcblogs.nebraska.gov/techrodeo
Presentasi cisco
This document provides an overview of networking concepts including the OSI reference model, TCP/IP model, Ethernet, and networking components. It describes the seven layers of the OSI model and the functions of the transport, network, data link, and physical layers. It also discusses the four-layer TCP/IP model and data encapsulation. Components like hubs, switches, and routers are defined along with their functions. Ethernet cabling types and optical fiber standards are also covered.
Computer Networking Tasks.docx
The document discusses several topics related to computer networking:
1. It explains how subnet masks are used to distinguish the network and host parts of IP addresses and how they allow controlling the number of addresses on a network.
2. It describes how checksums are used in internet protocols like IP, UDP and TCP to detect errors in transmitted data.
3. It discusses VLANs and how they provide logical network segmentation within a physical LAN, as well as inter-VLAN routing.
4. It covers load balancing techniques used to distribute network traffic across multiple servers for improved scalability and reliability.
Common network devices
Networking hardware facilitates data transmission and communication over computer networks. It includes devices like hubs, switches, routers and bridges that connect different parts of a network and mediate the flow of data. These devices operate at different layers of the OSI model, with hubs and repeaters at layer 1, bridges and switches at layer 2, and routers at layer 3. Common networking hardware also includes wireless access points, modems, network interface cards and other equipment that allows devices to connect to networks and exchange information.
dcn.pdf
This document discusses different network topologies and switching techniques. It begins by defining network topology and describing five common topologies - bus, ring, star, mesh, and hybrid. It then defines what a computer network is and categorizes networks by size into LAN, PAN, MAN and WAN. The document also discusses random access protocols including ALOHA, CSMA and their variations. It compares TCP and UDP protocols. Finally, it discusses circuit switching and its two technologies - space division switching using crossbar switches, and multistage switching.
Class 2
The document discusses different types of transmission modes, network types, and networking devices. It describes three transmission modes: simplex, half-duplex, and full-duplex. It also defines different network types including personal area networks (PAN), local area networks (LAN), metropolitan area networks (MAN), and wide area networks (WAN). Finally, it provides brief descriptions of common networking devices like hubs, switches, and routers.
Routers vs-switch
Routers and switches are networking devices that allow computers and other devices to connect to each other and form networks. While routers connect separate logical networks and operate at the network layer, switches operate at the data link layer and connect devices within a single local area network by forwarding data frames. The functions of routers and switches differ, with routers directing traffic between networks and switches allowing many devices to share a connection and increasing network bandwidth.
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COMPARISON OF ROUTING PROTOCOLS FOR AD HOC WIRELESS NETWORK WITH MEDICAL DATA
COMPARISON OF ROUTING PROTOCOLS FOR AD HOC WIRELESS NETWORK WITH MEDICAL DATA
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M1
The document provides recommendations for promoting an e-commerce system, including:
1) Optimizing search engine optimization through keywords, meta tags, and links to increase website visibility.
2) Using newsgroups and forums to generate discussion and exposure of the website.
3) Implementing banners and pop-ups on other popular websites to advertise.
4) Ensuring the website has an intuitive user interface and establishes customer loyalty through rewards to encourage return visits and purchases.
Communication devices
This document defines and describes several key terms related to computer networking and telecommunications:
- Modems are devices that control data flow between a computer and other devices like modems, allowing for data transfer.
- 3G and 4G are mobile phone standards that allow for increasingly faster internet access on mobile networks through improvements like LTE.
- Mobile phones can make calls, send texts, and access the internet via mobile networks or Bluetooth to communicate.
- Tablets and laptops are portable computers that can access wireless networks to transfer data to other devices. Tablets differ in lacking a built-in keyboard.
Interconnecting devices
Interconnecting devices allow computers to communicate over networks. Routers connect wireless devices to networks without cables, and find the fastest data path. Switches create networks and use CAM tables to route data to devices via MAC addresses, while hubs broadcast data to all devices. Bridges connect multiple LANs by recording data sources and destinations. Wireless access points connect devices to LANs but lack IP addressing and firewalls unlike routers.
OSI Draft
The document describes the seven layers of the OSI model from highest to lowest:
1) The application layer provides interfaces between applications and the network. Common protocols include HTTP, FTP, and DNS.
2) The presentation layer serves as a data translator and handles encryption/decryption.
3) The session layer establishes and terminates communication sessions between applications and provides services like dialog management.
4) The transport layer ensures reliable data transmission through error checking, data recovery, and message segmentation/reassembly.
5) The network layer handles addressing, routing, encapsulation, and de-encapsulation of data packets.
6) The data link layer moves data across a physical link through frames
P5 ram instillation
The document provides instructions for installing RAM and a wireless network interface card (NIC) in a computer tower. It advises checking the existing RAM amount before installation. When opening the tower, take anti-static precautions and carefully locate slots to insert the new RAM and place the wireless NIC. After closing up, check that the NIC is functioning and that the RAM amount increased as expected. It also provides brief directions for connecting to a wireless network by selecting the network name and entering the chosen password.
P2 computer systems
This document summarizes several types of computer systems:
Laptops are portable computers with built-in keyboards and batteries that can be used for work on the go. Tablets are touchscreen mobile devices larger than phones with long battery life and virtual keyboards. Servers are computer hardware that run network services to meet the needs of connected computers. Desktop computers are non-portable personal computers used in a single location with keyboards, mice, and towers.
P1 computer components
The document defines and describes common computer components including RAM, ROM, CPU, hard drive, video card, power supply, computer fan, BIOS, and motherboard. RAM stores temporary information, ROM stores permanent information, the CPU performs calculations, the hard drive stores data, the video card generates images, the power supply converts AC to DC power, the fan prevents overheating, the BIOS starts the operating system, and the motherboard powers and connects other components.
Ipod presentation
The document provides information about the iPod touch. It discusses the generations of the iPod touch that were released between 2007 and 2010. It notes that over 6 million iPod touch units have been sold worldwide. The iPod touch allows users to download and listen to music, watch videos, download and play games, take photos, and access the internet via Wi-Fi. Storage sizes ranged from 18GB and the iPod touch had a camera that could take high-definition photos.
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
ここ3000字までしか入らないけどタイトルの方がたくさん文字入ると思います。
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
Managed s.
- 1. Port configuration and security
- 2. Allows the user to control the speed of each individual port between 100mbps, 10mbps, auto and disable. Disable allows the user to disconnect the device, connected to that port, from that network. It also allows the user to control the priority of the ports.
- 4. Half duplex – is where two devices can send and receive data but only one at a time. Full duplex – is where both devices can transmit and receive data at the same time and any time. Auto negotiation - is where both devices will communicated to each other and then decide which settings are best for them.
- 5. (DVLAN) doubleVLAN allows traffic to pass though one domain to another though the metro core, this allows users to connect toWANs like the Internet. PrivateVLAN – this allows layer two isolation for ports with same domain. DHCP snooping is a feature that acts between hosts and DHCP servers checking if the data being received is harmful to the server and then creating a database where it contains the IP address from harmful data.
- 6. Bridge protocol data unit (BPDU) – is a message sent across the network containing information like address and port configuration. Also while be sent they detect if there are any loops in the networks. Spanning tree root guard (STRG) – prevents new on unauthorised devices on a network to become a main/root device for a VLAN