» Từ khóa: Cisco Networking

ACLs are lists of conditions that are applied to traffic traveling across a router's interface.  These lists tell the router what types of packets to accept or deny. Acceptance and denial can be based on specified conditions. ACLs enable management of traffic and secure access to and from a network. ACLs can be created for all routed network protocols, such as Internet Protocol (IP) and Internetwork Packet Exchange (IPX). ACLs can be...

 47 p dtu 18/12/2012 222 1 Download

Từ khóa: Access Control List, Routing Basics, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

Redundant topologies eliminate single points of failure. If a path or device fails, the redundant path or device can take over the tasks of the failed path or device. A redundant switched topology may cause broadcast storms, multiple frame copies, and MAC address table instability problems.

 22 p dtu 18/12/2012 215 1 Download

Từ khóa: Intermediate Routing, Switching Basics, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

VLANs logically segment switched networks based on the functions, project teams, or applications of the organization regardless of the physical location or connections to the network. All workstations and servers used by a particular workgroup share the same VLAN, regardless of the physical connection or location. Configuration or reconfiguration of VLANs is done through software. Physically connecting or moving cables and equipment is...

 26 p dtu 18/12/2012 221 1 Download

Từ khóa: Intermediate Routing, Switching Basics, VIRTUAL LANs, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

The primary duties of the transport layer, Layer 4 of the OSI model, are to transport and regulate the flow of information from the source to the destination, reliably and accurately. End-to-end control and reliability are provided by sliding windows, sequencing numbers, and acknowledgments To understand reliability and flow control, think of someone who studies a foreign language for one year and then they visit the country where that...

 40 p dtu 18/12/2012 220 1 Download

Từ khóa: Networking Basics, TCP/IP TRANSPORT, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

In order to use host names to communicate with other IP devices, network devices such as routers must be able to associate the host names with IP addresses. A list of host names and their associated IP addresses is called a host table.

 19 p dtu 18/12/2012 204 1 Download

Từ khóa: Router Basics, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

The startup process of the router normally loads into RAM and executes one of these operating environments. The configuration register setting can be used by the system administrator to control the default start up mode for the router. The ROM monitor performs the bootstrap process and provides low-level functionality and diagnostics. It is used to recover from system failures and to recover a lost password. The ROM monitor cannot be accessed...

 22 p dtu 18/12/2012 193 1 Download

Từ khóa: Routing Basics, network interfaces, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

A wide-area network (WAN) is a data communications network spanning a large geographic area such as a state, province, or country. WANs often use transmission facilities provided by common carriers, for example, telephone companies. These are the major characteristics of WANs: They connect devices that are separated by wide geographical areas. They use the services of carriers such as the Regional Bell Operating Companies (RBOCs),...

 21 p dtu 18/12/2012 244 1 Download

Từ khóa: Router Basics, wide-area network, data communications network, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

IP is an unreliable method for delivery of network data. It is known as a best effort delivery mechanism. It has no built-in processes to ensure that data is delivered in the event that problems exist with network communication. If an intermediary device such as a router fails, or if a destination device is disconnected from the network, data cannot be delivered. Additionally, nothing in its basic design allows IP to notify the sender that a...

 28 p dtu 18/12/2012 211 1 Download

Từ khóa: Routing Basics, TCP/IP Suite Error, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

Link-state routing protocols perform in a very different way from distance vector protocols. Understanding the difference between distance vector and link-state protocols is vital for network administrators. One essential difference is that distance vector protocols use a simpler method of exchanging routing information. Figure outlines the characteristics of both distance vector and link-state routing protocols. Link-state routing...

 76 p dtu 18/12/2012 214 1 Download

Từ khóa: Single Area OSPF, Switching Basics, Intermediate Routing, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

Routing table updates occur periodically or when the topology in a distance vector protocol network changes. It is important that a routing protocol be efficient in updating the routing tables. As with the network discovery process, topology change updates proceed systematically from router to router. Distance vector algorithms call for each router to send its entire routing table to each of its adjacent neighbors. The routing tables include...

 47 p dtu 18/12/2012 191 1 Download

Từ khóa: Routing Protocols, Routing Basics, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

A protocol is a set of rules that determines how computers communicate with each other across networks. Computers communicate with one another by exchanging data messages. To accept and act on these messages, computers must have definitions of how a message is interpreted. Examples of messages include those establishing a connection to a remote machine, e-mail messages, and files transferred over a network. A protocol describes the following:...

 85 p dtu 18/12/2012 185 1 Download

Từ khóa: Networking Basics, routing fundamentals, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking

The Internet was developed to provide a communication network that could continue to function in wartime. Although the Internet has evolved in ways very different from those imagined by its architects, it is still based on the TCP/IP protocol suite. The design of TCP/IP is ideal for the decentralized and robust network that is the Internet. Many protocols used today were designed using the four-layer TCP/IP model. It is useful to know both the...

 74 p dtu 18/12/2012 217 1 Download

Từ khóa: IP Addressing, TCP/IP Protocol, Networking basics, mạng cơ bản, kỹ thuật mạng, công nghệ mạng, Cisco Networking