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Hi, 
 
1) This is related to the CCNA exam 
2) This is related to the discussion at one of the test prep 
3) It is related to the IOS command: &quot;show cdp neighbors&quot; as the followings: 
Sw-AC3#show cdp neighbors 
4) The results: It is in a spread-sheet but i present it with the explanation: 
 
Field 1: Device ID 
1)Sw-DS1 
2)Sw-AC2 
3)VLAN-R1 
Field 2: Local Interface 
1)Fas 0/12 
2)Fas 0/9 
3)Fas 0/3 
Field 3: Hold-Time 
1)130 
2)176 
3)152 
Field 4: Capability 
1)S (Switch) 
2)S 
3)R 
Field 5: Platform 
1)2950 
2)2950 
3)2620 
Field 6: Port ID 
1)Fas 0/12 
2)Fas 0/9 
3)Fas 0/0.1 
 
5) My Questions: Please say it with your own wordings, but you can provide the &quot;links&quot; if necessary, 1)What is the &quot;Local Interface&quot;? Is it the interface at the Swith Sw-AC3 itself?, 2) What is the &quot;Port ID&quot;?, 3) If necessary please explain the differences between the &quot;local interface&quot; vs &quot;port ID&quot; 
6) Thank you 
 
Tjie
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Hi,

1) This is related to the CCNA exam
2) This is related to the discussion at one of the test prep
3) It is related to the IOS command: "show cdp neighbors" as the followings:
Sw-AC3#show cdp neighbors
4) The results: It is in a spread-sheet but i present it with the explanation:

Field 1: Device ID
1)Sw-DS1
2)Sw-AC2
3)VLAN-R1
Field 2: Local Interface
1)Fas 0/12
2)Fas 0/9
3)Fas 0/3
Field 3: Hold-Time
1)130
2)176
3)152
Field 4: Capability
1)S (Switch)
2)S
3)R
Field 5: Platform
1)2950
2)2950
3)2620
Field 6: Port ID
1)Fas 0/12
2)Fas 0/9
3)Fas 0/0.1

5) My Questions: Please say it with your own wordings, but you can provide the "links" if necessary, 1)What is the "Local Interface"? Is it the interface at the Swith Sw-AC3 itself?, 2) What is the "Port ID"?, 3) If necessary please explain the differences between the "local interface" vs "port ID"
6) Thank you

Tjie

CCNA Exams: show cdp neighbors

Transmission Control Protocol/Internet Protocol (TCP/IP) is the set of networking protocols that define end-to-end connectivity specifying how data should be packeted, addressed, transmitted, routed and received at the destination. This functionality is organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved.

TCP/IP

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.