If the IP header checksum of an arrived datagram checked with error by a destination host, then an ICMP destination unreachable message is created and send to the source host. True False
Added by Victor S.
Step 1
The IP header checksum is used to verify the integrity of the IP header in a datagram. If the checksum does not match, it indicates that the header has been corrupted during transmission. Show more…
Show all steps
Your feedback will help us improve your experience
Akash M and 59 other AP CS educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
An analyst is reviewing the following output as part of an incident: ICMP ECHO REQUEST 192.168.1.10 -> 10.20.30.40 Length=10 ABCDEFGHIJ ICMP ECHO REQUEST 192.168.1.10 -> 10.20.30.40 Length=15 ABCDEFGHIJ ICMP ECHO REQUEST 192.168.1.10 -> 10.20.30.40 Length=20 ABCDEFGHIJ1234567890 Which of the following is MOST likely happening? - The hosts are part of a reflective denial-of-service attack. - Information is leaking from the memory of host 10.20.30.40. - Sensitive data is being exfiltrated by host 192.168.1.10. - Host 192.168.1.10 is performing firewall port knocking.
Akash M.
A TCP segment consisting of 1460 bytes of data and 20 bytes of header is sent to the IP layer, which appends another 20 bytes of header. This is then transmitted through two networks, each of which uses an 18-byte packet header/CRC. The destination network has a maximum frame size of 8000 bits. How many bytes, including headers, are delivered to the network layer at the destination?
Networking ARP/ICMP Scenario 1: H1 is trying to communicate with H4. They are on separate networks that are connected by R. All machines are running properly. H1's ARP table has been cleared out, so before sending any data, it must send out an ARP Request. It receives an ARP Reply back. For the ARP Reply: The operation field is set to _______ ______'s MAC address is set as the sender hardware address of the ARP Packet ______'s IP address is set as the sender protocol address of the ARP Packet ______'s MAC address is set as the target hardware address of the ARP Packet ______'s IP address is set as the target protocol address of the ARP Packet H1 sees ______'s MAC address set as the source address on the Ethernet Frame that encapsulates the ARP Reply it receives H1 sees ______'s MAC address set as the destination address on the Ethernet Frame that encapsulates the ARP Reply it receives Scenario 3: H3 is trying to ping H4. They are on separate networks that are connected by R1. H4 is currently shut down. What type of ICMP error message will be sent? (Give the name) Who will be the source IP address on the IP datagram that has the ICMP error message encapsulated? Who will be the destination IP address on the IP datagram that has the ICMP error message encapsulated? Scenario 4: H2 is trying to ping H5. They are on separate networks that are connected by R1 and R2. When sending the ping, H2 sets the TTL field to 2. What type of ICMP error message will be sent? (Give the name) Who will be the source IP address on the IP datagram that has the ICMP error message encapsulated? Who will be the destination IP address on the IP datagram that has the ICMP error message encapsulated? Scenario 5: H6 runs the traceroute program to find the route to H1. They are on separate networks that are connected by R2 and R1. For each ping request H6 sends out, what is the destination IP address set to in the IP datagram that encapsulates the Ping Request? For each ping request H6 sends out, who does H6 set as the destination MAC address in the Ethernet Frame that encapsulates the IP datagram that encapsulates the Ping Request? Which machine(s) will send Time Exceeded error message(s) to H6? Who will be the source IP address on the IP datagram that encapsulates the Ping Reply? When H6 receives the Ping Reply, who will be set as the source MAC address on the Ethernet Frame that has the IP datagram that encapsulates the Ping Reply?
Recommended Textbooks
Computer Science and Information Technology
Introduction to Programming Using Python
Computer Science - An Overview
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD