5.4 Do I have to check/decrement the TTL in the IP header if the packet is addressed to me?.5.3 Do I have to be able to handle IP Options.5.2 How do I have to deal with fragmented packets?.5.1 Do I have to handle Muticast in my router?.4.5 How many ARP requests must I send to a host withouh a response before I send an ICMP host unreachable packet back to the sending host?.4.4 Why are the ARP packets I get from sr_send_packet(.4.3 How do we implement the arp queue timeout? Should we use multiple threads or a timer?.4.2 How do I implement the ARP cache? Is a static table sufficient? Do I need a hash table?.4.1 What ARP functionality do I have to handle?.3.2 Does the Ethernet MTU include the header?.3.1 Do I have to deal with the ethernet preamble/crc?.

2.5 Ping/traceroute/etc appears to work, but I don’t see the return packets inside my router.2.4 When I run traceroute, why don’t get a reply from the hop before my router?.2.3 I tried running the skeleton code and then accessing one of the webservers, however it doesn’t work.2.1 How do I know that my topology is set up and working?.1.5 What sort of routing entries do we need to support in the routing table?.1.4 What kind of sanity checks should I perform on the packet header?.1.3 What are good references for dealing with protocol headers?.1.2 What is the best methodology for debugging my router?.1.1 Which files in the stub code can I modify?.

Wireshark ip header checksum