0
What else can I help you with?
Why is it that an ICMP packet does not have source and destination port?
Because ICMP is on the network layer
Where the icmp request are originated?
icmp request is orginated on the OSI network layer with ip protocol.
Why filtering ICMP traffics by ACLs is not advised?
Because ICMP traffic, notably ICMP ECHO REQUEST-0 and ECHO REPLY-8 are used in network diagnostic sequences.
Which protocols can be seen using Network Monitor?
ICMP and ARP
What is the response if a host sends a ICMP to a default gateway?
If devices on a network are properly configured, a host sending ICMP to a default gateway must receive a reply. ICMP simply means ping.
Should a router give ICMP messages priority over normal traffic. Why or why not?
Yes, a router should prioritize ICMP messages over normal traffic because ICMP (Internet Control Message Protocol) is essential for network diagnostics and error reporting. It helps in determining network connectivity issues and routing problems, enabling faster troubleshooting. Prioritizing ICMP can enhance network reliability and performance by ensuring that critical messages about network conditions are delivered promptly, which is particularly important in maintaining efficient communication between devices. However, excessive prioritization should be avoided to prevent disruption of regular data flows.
Which protocol should be allowed when not able to ping a remote device residing behind a firewall?
ICMP is the internet control access protocol . ICMP is the plrotocol that should be allowed when not able to ping a remote device residing behind a firewall. ICMP is the protocol of network layer.
How do you fix icmp?
The question does not make sense; ICMP isn't broken - it is the protocol for informing other devices or users that there are problems on the network, or for control messages in general.
What are the main functions of icmp?
Internet Control Message Protocol (ICMP), documented in RFC 792, is a required protocol tightly integrated with IP. ICMP messages, delivered in IP packets, are used for out-of-band messages related to network operation or mis-operation. Of course, since ICMP uses IP, ICMP packet delivery is unreliable, so hosts can't count on receiving ICMP packets for any network problem. Some of ICMP's functions are to: * Announce network errors, such as a host or entire portion of the network being unreachable, due to some type of failure. A TCP or UDP packet directed at a port number with no receiver attached is also reported via ICMP. * Announce network congestion. When a router begins buffering too many packets, due to an inability to transmit them as fast as they are being received, it will generate ICMP Source Quenchmessages. Directed at the sender, these messages should cause the rate of packet transmission to be slowed. Of course, generating too many Source Quench messages would cause even more network congestion, so they are used sparingly. * Assist Troubleshooting. ICMP supports an Echo function, which just sends a packet on a round--trip between two hosts. Ping, a common network management tool, is based on this feature. Ping will transmit a series of packets, measuring average round--trip times and computing loss percentages. * Announce Timeouts. If an IP packet's TTL field drops to zero, the router discarding the packet will often generate an ICMP packet announcing this fact. TraceRoute is a tool which maps network routes by sending packets with small TTL values and watching the ICMP timeout announcements.By far the most common use of icmp is ping.
What protocol allows hosts to exchange messages to indicate problems with packet delivery?
ICMP The Internet Message Protocol (ICMP) allows hosts to exchange messages to indicate the status of a packet as it travels through the network.
Which port is used by ICMP?
There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply permit icmp any any echo Or the same using the icmp code permit icmp any any 0 permit icmp any any 8
Is a Network layer protocol that reports on the success or failure of data delivery?
ICMP (Internet Control Message Protocol)
