What does router computing power mean
Publish: 2021-05-16 12:31:09
1.
The reset key is a key that can restore the factory settings. Generally, when resetting the router, press and hold it for 5 seconds, and all the lights are on, indicating that the reset is successful. At this time, the router can be debugged again, and the previous data in it has been cleared< br />
2. The type of interface that the router can support reflects the universality of the router. Common interface types are: universal serial interface (converted to RS? Via cable)? 232 DTE / DCE interface, V.35 DTE / DCE interface, X.21 DTE / DCE interface, RS? 449 DTE / DCE interface and eia530 DTE interface, etc.), 10M Ethernet interface, fast Ethernet interface, 10 / 100 adaptive Ethernet interface, Gigabit Ethernet interface, ATM interface (2m, 25m, 155m, 633m, etc.), POS interface (155m, 622m, etc.), token ring interface, FDDI interface, E1 / T1 interface, E3 / T3 interface, ISDN interface, etc
number of slots available to users
this indicator refers to the number of slots that users can use in molar routers, except for CPU board, clock board and other necessary system boards and / or special slots for system boards. According to the index and the port density of the subscriber board, the maximum number of ports supported by the router can be calculated<
CPU
CPU is the heart of router no matter in middle and low end router or high end router. Usually in the middle and low end routers, CPU is responsible for exchanging routing information, routing table lookup and forwarding packets. In the above routers, the capacity of CPU directly affects the throughput (routing table lookup time) and routing computing capacity (network routing convergence time). In high-end routers, packet forwarding and table lookup are usually performed by ASIC chip, while CPU only implements routing protocol, calculates routing and distributes routing table. Due to the development of technology, many jobs in router can be realized by hardware (special chip). CPU performance does not fully reflect router performance. Router performance is represented by throughput, delay and routing computing power
memory
the router may contain a variety of memories, such as flash, DRAM, etc. Memory is used to store configuration, router operating system, routing protocol software, etc. In middle and low end routers, routing tables may be stored in memory. Generally speaking, the larger the router memory, the better (regardless of the price). However, similar to CPU power, memory does not directly reflect router performance and capability. Because efficient algorithm and excellent software may greatly save memory
port density
this indicator reflects the integration degree of router manufacturing. Due to the different sizes of routers, this index should be equivalent to the number of ports per inch in the rack. However, for the sake of intuition and convenience, the maximum number of each port supported by the router can be used instead<
routing information protocol (RIP)
Rip is a distance vector based routing protocol, which usually uses hops as the measurement standard. Rip is an internal gateway protocol. Rip is the most widely used routing protocol because of its simple implementation. This protocol converges slowly and is generally used in small-scale networks. Rip protocol is stipulated in RFC 1058
policy routing mode
in addition to the destination address as the basis for routing, the router can also select the path for the packet according to the TOS field, source and destination port number (high level application protocol). Policy routing can achieve traffic engineering to a certain extent, so that different quality of service flows or different nature of data (voice, FTP) take different paths<
distance vector multicast routing protocol (DVMRP)
DVMRP is a distance vector based multicast routing protocol, which is basically developed based on rip. DVMRP uses IGMP to switch routing with neighbors
full plex line speed forwarding capability
the most basic and important function of router is packet forwarding. Forwarding small packets at the same port rate is the biggest test of router packet forwarding ability. Full plex line speed forwarding capability refers to the minimum packet length (64 bytes for Ethernet and 40 bytes for POS port) and minimum packet interval (in accordance with the protocol) for bidirectional transmission on the router port without packet loss. This index is an important index of router performance
device throughput
refers to the packet forwarding capability of the whole device, which is an important indicator of device performance. The router's job is to route according to IP packet header or MPLS label, so the performance index is the number of forwarding packets per second. Device throughput is usually less than the sum of all port throughput of router
port throughput
port throughput refers to the packet forwarding capability of a port, which is usually measured by PPS: packets per second. It is the packet forwarding capability of a router on a certain port. Two interfaces with the same rate are usually used for testing. However, the test interface may be related to the location and relationship of the interface. For example, the throughput between ports on the same card may be different from that on different cards
routing table capability
routers usually rely on the established and maintained routing table to decide how to forward. Routing table capacity refers to the limit of the number of routing table entries in a routing table. Because the router executing BGP protocol on the internet usually has hundreds of thousands of routing table entries, this project is also an important embodiment of the router's ability
backplane capability
backplane capability is the internal implementation of router. The backplane capability can be reflected in the router throughput: the backplane capability is usually greater than the value calculated according to the throughput and the test range. However, the backplane capability can only be reflected in the design, and generally can not be tested<
QoS classification
refers to the information on which routers can distinguish QoS. The simplest QoS classification can be port based. Similarly, the router can distinguish packet priority according to link layer priority (specified in 802.1Q) and upper layer content (TOS field, source address, destination address, source port, destination port and other information).
number of slots available to users
this indicator refers to the number of slots that users can use in molar routers, except for CPU board, clock board and other necessary system boards and / or special slots for system boards. According to the index and the port density of the subscriber board, the maximum number of ports supported by the router can be calculated<
CPU
CPU is the heart of router no matter in middle and low end router or high end router. Usually in the middle and low end routers, CPU is responsible for exchanging routing information, routing table lookup and forwarding packets. In the above routers, the capacity of CPU directly affects the throughput (routing table lookup time) and routing computing capacity (network routing convergence time). In high-end routers, packet forwarding and table lookup are usually performed by ASIC chip, while CPU only implements routing protocol, calculates routing and distributes routing table. Due to the development of technology, many jobs in router can be realized by hardware (special chip). CPU performance does not fully reflect router performance. Router performance is represented by throughput, delay and routing computing power
memory
the router may contain a variety of memories, such as flash, DRAM, etc. Memory is used to store configuration, router operating system, routing protocol software, etc. In middle and low end routers, routing tables may be stored in memory. Generally speaking, the larger the router memory, the better (regardless of the price). However, similar to CPU power, memory does not directly reflect router performance and capability. Because efficient algorithm and excellent software may greatly save memory
port density
this indicator reflects the integration degree of router manufacturing. Due to the different sizes of routers, this index should be equivalent to the number of ports per inch in the rack. However, for the sake of intuition and convenience, the maximum number of each port supported by the router can be used instead<
routing information protocol (RIP)
Rip is a distance vector based routing protocol, which usually uses hops as the measurement standard. Rip is an internal gateway protocol. Rip is the most widely used routing protocol because of its simple implementation. This protocol converges slowly and is generally used in small-scale networks. Rip protocol is stipulated in RFC 1058
policy routing mode
in addition to the destination address as the basis for routing, the router can also select the path for the packet according to the TOS field, source and destination port number (high level application protocol). Policy routing can achieve traffic engineering to a certain extent, so that different quality of service flows or different nature of data (voice, FTP) take different paths<
distance vector multicast routing protocol (DVMRP)
DVMRP is a distance vector based multicast routing protocol, which is basically developed based on rip. DVMRP uses IGMP to switch routing with neighbors
full plex line speed forwarding capability
the most basic and important function of router is packet forwarding. Forwarding small packets at the same port rate is the biggest test of router packet forwarding ability. Full plex line speed forwarding capability refers to the minimum packet length (64 bytes for Ethernet and 40 bytes for POS port) and minimum packet interval (in accordance with the protocol) for bidirectional transmission on the router port without packet loss. This index is an important index of router performance
device throughput
refers to the packet forwarding capability of the whole device, which is an important indicator of device performance. The router's job is to route according to IP packet header or MPLS label, so the performance index is the number of forwarding packets per second. Device throughput is usually less than the sum of all port throughput of router
port throughput
port throughput refers to the packet forwarding capability of a port, which is usually measured by PPS: packets per second. It is the packet forwarding capability of a router on a certain port. Two interfaces with the same rate are usually used for testing. However, the test interface may be related to the location and relationship of the interface. For example, the throughput between ports on the same card may be different from that on different cards
routing table capability
routers usually rely on the established and maintained routing table to decide how to forward. Routing table capacity refers to the limit of the number of routing table entries in a routing table. Because the router executing BGP protocol on the internet usually has hundreds of thousands of routing table entries, this project is also an important embodiment of the router's ability
backplane capability
backplane capability is the internal implementation of router. The backplane capability can be reflected in the router throughput: the backplane capability is usually greater than the value calculated according to the throughput and the test range. However, the backplane capability can only be reflected in the design, and generally can not be tested<
QoS classification
refers to the information on which routers can distinguish QoS. The simplest QoS classification can be port based. Similarly, the router can distinguish packet priority according to link layer priority (specified in 802.1Q) and upper layer content (TOS field, source address, destination address, source port, destination port and other information).
3. Credit cards were issued last year. We can't change that time to the previous two years.
4. If you are late for work and change the system time upside down, although it can be seen from the data on the surface that you are not late, if the network administrator controls to the background, you can still see the details of changing the system time. Therefore, it is possible to check whether the company checks. If not, there should be no problem.
5. How much do you throw
6. Hello, the landlord can't use the clock in software after changing the time. The clock in software also has its own time setting.
7. It's OK for management to have this permission
8. As long as the information network can be found in the formal ecation, the country is recognized
9. 1. IPA international professional qualification certificate is the only one fully certified by the Chinese Embassy in the United States and signed by the representative of Chinese Embassy and consulate< The IPA international vocational qualification certificate has been approved by the Ministry of ecation. And students can also apply for the qualification certificate of enterprise management talent pool of the Ministry of personnel of the people's Republic of China
3. The IPA international professional qualification certificate has been fully recognized by the federal government of the United States and signed by Secretary of State Condoleezza Rice
4. IPA international vocational qualification certificate has been recognized by the U.S. Department of ecation and the local government department of ecation and legal departments.
3. The IPA international professional qualification certificate has been fully recognized by the federal government of the United States and signed by Secretary of State Condoleezza Rice
4. IPA international vocational qualification certificate has been recognized by the U.S. Department of ecation and the local government department of ecation and legal departments.
10. 1. Open poco camera software of mobile phone and click "take a picture" in software interface<
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2. To enter the "photo" interface, we first click the "icon" in the lower right corner, and then a series of auxiliary photo settings will pop up
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3. After taking photos, we can beautify the photos, select "color", and then click the "icon" in the lower right corner
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4. After beautification, click "save". After saving to the album, we can also "share" it on Weibo and wechat
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please click to input the picture description
2. To enter the "photo" interface, we first click the "icon" in the lower right corner, and then a series of auxiliary photo settings will pop up
please click to input the picture description
3. After taking photos, we can beautify the photos, select "color", and then click the "icon" in the lower right corner
please click to input the picture description
4. After beautification, click "save". After saving to the album, we can also "share" it on Weibo and wechat
please click to input the picture description
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