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Ccna network administration

Xem 1-20 trên 149 kết quả Ccna network administration
  • The following will be discussed in this chapter: 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,...

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  • After completing this chapter, students will be able to: Describe the role of dynamic routing protocols and place these protocols in the context of modern network design, identify several ways to classify routing protocols, describe how metrics are used by routing protocols and identify the metric types used by dynamic routing protocols,...

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  • The following will be discussed in this chapter: Configure DHCP in an enterprise branch network, Configure NAT on a Cisco router, Configure new generation RIP (RIPng) to use IPv6. Every device that connects to a network needs an IP address. Network administrators assign static IP addresses to routers, servers, and other network devices whose locations (physical and logical) are not likely to change.

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  • Learning objectives of this chapter include: Secure the physical installation of and the administrative access to Cisco routers based on different network requirements using the CLI and CCP; configure administrative roles using privilege levels and role-based CLI; Implement the management and reporting features of syslog, SNMP, SSH, and NTP;...

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  • What is Inter-VLAN RoutingWhat is Inter-VLAN Routing? Each VLAN is a unique broadcast domain. Computers on separate VLANs are, by default, not able to communicate. Each VLAN is a unique IP subnetwork. To allow VLANs to communicate, we need a router to communicate among separate broadcast domains and unique IP subnetworks. Inter-VLAN routing, then, is a process of forwarding traffic from one VLAN to another VLAN using a router.

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  • IEEE 802.1w RSTIEEE RSTP: What is it? Is an evolution of the 802.1D standard. Terminology remains primarily the same. Most parameters have been left unchanged. Speeds the recalculation of the spanning tree on a topology change. Much faster convergence.• Redefines the type of ports and their state. Alternate or backup ports can immediately change to forwarding state without waiting for the network to converge.

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  • Tham khảo bài thuyết trình 'cnna3-chapter 5: part i', công nghệ thông tin, quản trị web phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • As businesses become increasingly dependent on the network, the availability of the network infrastructure becomes a critical business concern. • Redundancy is the solution for achieving the necessary availability. • Layer 2 redundancy improves the availability of the network by implementing alternate network paths by adding equipment and cabling. • Having multiple paths for data to traverse the network allows for a single path to be disrupted without impacting the connectivity of devices on the network...

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  • The VLAN Trunking Protocol (VTP) allows you to simplify the management of the VLAN database across multiple switches. As the number of switches increases on a small- or mediumsized business network, the overall administration required to manage VLANs and trunks in a network becomes a challenge.The VLAN Trunking Protocol (VTP) allows you to simplify the management of the VLAN database across multiple switches. Benefits: VLAN configuration consistency across the entire network. Accurate tracking and monitoring of VLANs. Dynamic reporting of added VLANs across a network....

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  • The concept of trunking began with the telephone industry. • Multiple calls were moved between customers and central offices or between the offices themselves over a single physical connection.The same principle was applied to data communications to make better use of the communication line. • Additional advantages and cost savings were gained by using the same line for voice communications.The same principle of trunking is applied to network switching technologies. • A trunk is a physical and logical connection between two switches across which network traffic travels....

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  • In traditional switched LANs, the physical topology is closely related to the logical topology. • Generally, workstations must be grouped by their physical proximity to a switch. • To communicate among LANs, each segment must have a separate port on the backbone device or a connection to a common backbone.

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  • Password RecovePassword Recovery: To recover a switch password: Power up the switch with the Mode button pressed. Initialize flash. Load helper files Rename the current configuration file. Reboot the system. Reinstate the name of the configuration file and copy it into RAM. Change the password. Copy to start up configuration Reload the switch.

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  • Preamble/SOFD: Synchronize to medium. Destination Address: MAC Address of destination device. Source Address: MAC address of source device. • Length/Type: Length of frame or protocol type code. Data: Encapsulated data from OSI Layers 7 to 3. FCS: Frame Check Sequence.Broadcast: Indicates a broadcast or multicast frame. Local: indicates whether the address can be modified locally. OUI Number: Manufacturer of the NIC. Vendor Number: Unique, vendor assigned number.

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  • When building a LAN that satisfies the needs of a small or medium-sized business, your plan is more likely to be successful if a hierarchical design model is used. Divided into discrete layers. Each layer has a specific purpose. Becomes modular – maintenance, performance.Interfaces with end devices. Routers, switches, bridges, wireless access points. Provides a means of connecting and controlling which devices are allowed to communicate on the network.

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  • Tham khảo bài thuyết trình 'ccna exploration semester 1-chapter 4', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Classful addressing  Easy to work out but very wasteful.  Routers and hosts still assume class subnet masks by default. Class A /8 23-Jul-12 18.   Class B /16  Class C /24 addressing  Any suitable prefix can be used.  We (and devices) need to know what the prefix is. More flexible, less wasteful.

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  • Layer 3 protocol A layer 3 protocol such as IP version 4 must:  Provide an addressing scheme to identify networks and individual hosts.  Encapsulate a segment from layer 4 into a 17-Jul-12 CCNA Exploration Semester 1 5 packet and include addresses.  Direct the packet across one or many networks to the destination host.  Decapsulate (remove the packet header) and give the segment to layer 4.

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  • Remember, we are just beginning to herd the cats. Much of this will become clearer LATER! The more we learn, the more all of this will come into focus!The globalization of the Internet has succeeded faster than anyone could have imagined.  The manner in which social, commercial, political and personal interactions occur is rapidly changing to keep up with the evolution of this global network.

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  • Establishing a network performance baseline requires collecting key performance data from the ports and devices that are essential to network operation.1 Gather symptoms - Troubleshooting begins with the process of gathering and documenting symptoms from the network, end systems, and users. Stage 2 Isolate the problem - The problem is not truly isolated until a single problem, or a set of related problems, is identified.

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  • Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.) The missing information for Blank 1 is the command show ip route. The missing information for Blank 1 is the command debug ip route. The missing information for Blank 2 is the number 100

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