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Environmental Conditions  Be conscious of the climate conditions at all equipment locations and at all times of day.  A data center containing a large number of computers, routers, and other heat-producing devices will probably need an independent climate control system to keep the room cool enough.  Make sure a source of clean, consisten...

31 trang | Chia sẻ: thanhle95 | Ngày: 02/07/2021 | Lượt xem: 470 | Lượt tải: 1

Client/Server Networks  User accounts are stored in a central location.  A user logs on to the network from a computer that transmits the user name and password to a server, which either grants or denies access to the network.  Account information can be stored in a centralized directory service or on individual servers.  A directory s...

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Configuring a Modem  Most modems support the Plug and Play standard.  Modems typically need an interrupt request (IRQ) and an input/output (I/O) port to communicate with the computer.  For external modems, the IRQ and I/O port are assigned to the serial port.  For internal modems, you configure the device itself to use specific hardwar...

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Router Products  The Microsoft Windows 2000, Microsoft Windows NT, and Novell NetWare operating systems include routing capability.  Windows 2000, Microsoft Windows Me, and Microsoft Windows 98 Second Edition must use Internet Connection Sharing (ICS) to route IP traffic.  A stand-alone router is a hardware device that is essentially a ...

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Bridges and Collisions  A collision domain is a network (or part of a network) that is constructed so that a collision occurs when two computers transmit packets at precisely the same time.  Adding a hub to a local area network (LAN) increases its size but maintains a single collision domain because hubs relay signals immediately at the phy...

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BOOTP  Supplies an IP address and other Transmission Control Protocol/Internet Protocol (TCP/IP) parameters  Can supply an executable boot file using Trivial File Transfer Protocol (TFTP)  Requires you to manually configure parameters for each client  Cannot allocate IP addresses automatically  Cannot prevent IP address duplication6 ...

37 trang | Chia sẻ: thanhle95 | Ngày: 02/07/2021 | Lượt xem: 414 | Lượt tải: 1

ARP Address Resolution Process 1. IP packages transport layer information into a datagram by inserting the IP address of the destination system into the Destination IP Address field of the IP header. 2. IP compares the network identifier in the destination IP address to its own network identifier and determines whether to send the datagram di...

32 trang | Chia sẻ: thanhle95 | Ngày: 02/07/2021 | Lượt xem: 521 | Lượt tải: 1

Port Numbers and Sockets  A port number refers to a specific application or process running on a computer.  A socket is a combination of a port number and an IP address.  The Internet Assigned Numbers Authority (IANA) assigns well-known port numbers to common Internet applications.  The most commonly used port numbers are listed in the...

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IP Addresses  Internet Protocol (IP) is the only network layer protocol with its own addressing system.  IP addresses are 32 bits long.  IP addresses have two parts: a network identifier and a host identifier.  IP addresses are assigned to network interface adapters, not to computers.  The Source IP Address field in the IP header alwa...

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Fiber Optic Ethernet  Fiber Optic Inter-Repeater Link (FOIRL)  IEEE 802.3 fiber optic standards:  10Base-FL  10Base-FB  10Base-FP  100Base-FX  Gigabit Ethernet standards16 The 5-4-3 Rule  A standard network can have no more than FIVE segments, connected by FOUR repeaters, of which no more than THREE segments can be mixing segmen...

39 trang | Chia sẻ: thanhle95 | Ngày: 02/07/2021 | Lượt xem: 478 | Lượt tải: 1