The difference between a Layer 2 switch and a Layer 3 switch

rl3508
RicherLink Switch
1. The working level is different: the Layer 2 switch works at the data link layer, and the Layer 3 switch works at the network layer. The Layer 3 switch not only realizes high-speed forwarding of data packets, but also achieves optimal network performance according to different network conditions.
2. The principle is different: the principle of the Layer 2 switch is that when the switch receives a packet from a port, it will first read the source MAC address in the packet, then read the destination MAC address in the packet, and in the address table. Find the corresponding port. If there is a port corresponding to the destination MAC address in the table, copy the packet directly to this port. The principle of a three-layer switch is relatively simple. It is a route exchange multiple times. In general, it is the first source-to-destination route. The Layer 3 switch will transfer this data to the second layer, so next time it is the destination to the source. Source to destination can be exchanged quickly.
3. Different functions: Layer 2 switches are based on MAC address access, only data forwarding, and can not be configured with IP addresses, while Layer 3 switches combine Layer 2 switching technology and Layer 3 forwarding functions, that is, Layer 3 switches are in On the basis of the Layer 2 switch, the routing function is added. You can configure the IP addresses of different VLANs. The VLANs can communicate between different VLANs through Layer 3 routes.
4. Different applications: Layer 2 switches are mainly used for the network access layer and aggregation layer, while Layer 3 switches are mainly used for the network core layer, but there are also a small number of Layer 3 switches used for the aggregation layer.
5. Different supported protocols: Layer 2 switches support physical layer and data link layer protocols, such as Ethernet switches and Layer 2 switches. This hub HUB functions similarly, while Layer 3 switches support the physical layer, data link layer, and network. Layer protocol.

评论

发表评论

Popular blog posts

The difference between NB-IOT and Lora

图片
NB-IOT and Lora Introduction The wireless technologies of the  Internet of Things  are mainly divided into two categories: (1) One type is short-distance communication technology such as Zigbee, Wifi, Bluetooth, Z-wave; (2) The other type is LPWAN, which is a low-power wide-area network. LPWAN can be divided into two categories:  LoRa , SigFox, etc., which work on unlicensed spectrum, and 3GPP, which work in licensed spectrum. 2/3/4G cellular communication technologies such as EC-GSM, LTE Cat-m, NB-IoT, etc. The difference between NB-IoT and Lora 1. Frequency bands, quality of service and costs.  LoRa works in unlicensed frequency bands below 1Ghz, and does not require additional charges when applied. NB-IoT and cellular communication using licensed bands below 1 GHz are authorized and chargeable. 2. Battery life.  There are two important factors to consider regarding battery life, the current consumption of the node and the protocol content. LoRa is an asynchronous ALOHA-based
阅读全文

RL841EWV-DGB EPON ONU Router

图片
RicherLink RL841EWV-DGB  EPON ONU Overview EPON ONU Configuration The RicherLink RL841EWV-DGB  EPON ONU  brings carrier class high-end networking solution for advanced triple play services. It compliant with IEEE802.3ah standard, dual-band wireless for combined connection speeds of up to 1200 Mbps(867 Mbps on 5GHz and 300 Mbps on 2.4 GHz) , Layer 2/3, and high quality VoIP as well, RL841EWV-DGB ONU support the comprehensive triple-play services, including voice, video (IPTV or VoD), and high-speed internet access service. RicherLink RL841EWV-DGB EPON ONU MORE: www.richerlink.com/product/rl841ewv-dgb/ RicherLink  Technology Co., Ltd is a high-tech enterprise located in Shenzhen,China.The company provides customers with triple play business broadband access to the overall solution and help operators to provide their customers based on intelligent home gateway value-added services such as smart home,the overall network solutions,including the corresponding product development and
阅读全文

Introduction to the hierarchical model of GPON

GPON technical features are mainly reflected in the transmission convergence layer. The transmission aggregation layer is further divided into a PON frame sublayer and an adaptation sublayer. The framing sublayer of GTC (GPON Transmission Convergence) completes the ODN transmission function required for the encapsulation and termination of GTC frames. The specific functions of the PON (such as ranging, bandwidth allocation, etc.) are also terminated at the framing sublayer of the PON. The gametophyte layer is invisible. The adaptation sublayer of the GTC provides an interface between the PDU and the higher layer entity. The ATM and GEM information completes the conversion of the Service Data Unit (SDU) and the Protocol Data Unit PDU at the respective adaptation sublayers. The OMCI adaptation sublayer is higher than the ATM and GEM adaptation sublayers, which identify VPI/VCI and Port-ID and complete the exchange of OMCI channel data with higher-level entities. Application of GPON in
阅读全文