topology
The physical topology is the arrangement of the cables, network devices,
and end systems. It describes how the network devices are actually
interconnected with wires and cables. The logical topology is the path
over which the data is transferred in a network. It describes how the
network devices appear connected to network users.
speed
Speed is a measure of the data rate in bits per second (b/s) of a given link in the network.
cost
Cost indicates the general expense for purchasing of network components, and installation and maintenance of the network.
security
Security indicates how protected the network is, including the information that is transmitted over the network.
availability
Availability is the likelihood that the network is available for use when it is required.
scalability
Scalability indicates how easily the network can accommodate more users and data transmission requirements.
reliability
Reliability indicates the dependability of the components that make up
the network, such as the routers, switches, PCs, and servers.
point-to-point protocol
In computer networking, Point-to-Point Protocol (PPP) is a data link layer (layer 2) communications protocol
used to establish a direct connection between two nodes. It connects
two routers directly without any host or any other networking device in
between.
process switching
An older packet forwarding mechanism still available for Cisco routers.
fast switching
This is a common packet forwarding mechanism which uses a fast-switching cache to store next-hop information.
cisco express forwarding (CEF)
CEF is the most recent and preferred Cisco IOS packet-forwarding mechanism. Like fast switching,
wireless access points (WAPs)
Laptops and smartphones connect wirelessly to wireless access points (WAPs).
edge router
The edge router connects to a WAN SP, and also connects to an ISP for backup purposes.
gateway of last resort
A router is also usually configured with its own default gateway. This is known as the Gateway of Last Resort.
topology diagram
拓樸圖
secure shell (SSH)
Secure Shell是一種加密的網路傳輸協定，可在不安全的網路中為網路服務提供安全的傳輸環境。
hypertext transfer protocol secure (HTTPS)
超文字傳輸安全協定（英語：Hypertext Transfer Protocol Secure，縮寫：HTTPS，常稱為HTTP over TLS，HTTP over SSL或HTTP Secure）是一種透過電腦網路進行安全通訊的傳輸協定。
console cable
console纜線
terminal emulation software - Tera Term, PuTTY, Hyper Terminal
PuTTY 、PieTTY 、Tera Term 都是知名的免費連線工具，單一程式免安裝就可以執行
臨時要 Telnet 、SSH 連線或是 terminal console 這些小程式都很方便
Secure management access
Secures privileged EXEC, user EXEC, and remote access.
loopback interface
The loopback interface is a logical interface internal to the router. It is not assigned to a physical port and can therefore never be connected to any other device. The loopback interface is useful in testing and managing a Cisco IOS device because it ensures that at least one interface
will always be available. For example, it can be used for testing
purposes, such as testing internal routing processes, by emulating
networks behind the router.
以下為Cisco設備指令
no shutdown
interface loopback
show ip route
show running-config
show ip interface brief
show ip interfaces
show ipv6 interface
show interfaces
show ipv6 interface
show ipv6 route
Ctrl+P
Ctrl+N
show history
terminal history
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