What is the maximum number of routers that can be registered if the timestamp option flag in an IP datagram is set to the value of 1?
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What is the maximum number of routers that can be registered if the timestamp option flag in an IP datagram is set to the value of 1?
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- SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts. A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. You have defined the packet filter rule set shown in the table below. These rules permit and/or deny inbound and outbound traffic between the user agent and the mail server. Describe the purpose of each packet filter rule in the table. Rule Direction Source Address Destination Address Protocol Destination Port Action A2 In External Internal TCP 25 Permit B2 Out Internal External TCP > 1023 Permit C2 Out Internal External TCP 25 Permit D2 In External Internal TCP > 1023 Permit E2 Either Any Any Any Any DenyA router needs to transmit an IPv4 datagram with a total size of S bytes. The link layer of the router’s output port uses ATM AAL5 standard. Find the number of ATM cells that will be transmitted on this port, and the needed padding bytes, if any, for the following cases: For S = 42140, the total number of ATM cells is cells, and the number padding bytes are bytes. For S = 8871, the total number of ATM cells is cells, and the number padding bytes are bytes. For S = 36211, the total number of ATM cells is cells, and the number padding bytes are bytes. For S = 17752, the total number of ATM cells is cells, and the number padding bytes are bytes.A TCP connection has been running for a long time and the value of cwnd = 22759. The MSS is the traditional value of 1460 (Ethernet payload minus the TCP and IP headers). Assume that a packet gets successfully ACKed and then a timeout occurs due to packet loss. What are the values of cwnd after each sequential event? (Apply the integer floor function here and always round down for all fractional values.) cwnd after ACK: cwnd after dropped packet:
- Suppose the sequence number field on a TCP packet is 46005. The packet carries 102 bytes of (application-layer) data. The TCP header size on this packet is 20 bytes. (a) What is the sequence number of the last application byte contained in the packet above? (b) What is the value of the acknowledgment number field on the ACK that the receiver generates for the packet above? (c) Do you have sufficient information in this question to determine the value of the sequence number field of the ACK packet that the receiver generates for the packet above? If so, what is the sequence number? If not, why not? (d) If the size of the TCP header were larger (e.g., 24 bytes, due to additional TCP options), would your answers to parts (a)–(c) change? Why or why not?A router has the following Access Control List defined. Each line will be applied to the header of the packet, in order, until a match is found. If a match is found, the action (permit or deny) will be applied. ip access-list extended RemoteMgt permit tcp any host 192.168.1.100 eg 80 log deny tcp any any eq 80 permit ip any any This access will: O Allow any source address to reach 192.168.1.100 on port 80 Deny any source address from reaching any destination address on port 80 Allow all IP traffic from any source address to any destination address O Allow source address 192.168 1.100 to reach any destination address on port 80 Deny any source address from reaching any destination address on port 80 Deny all IP traffic from any source address to any destination address Allow source address 192.168 1.100 to reach any destination address on port 08 Deny source address 192.168.1.100 from reaching any destination address on port 08 Deny all IP traffic from any source address to any…A UDP packet is to be sent to a network with MTU=1460 Bytes. The size of UDP data field is 2992 Bytes. Assume this packet is fragmented when traversing the network. Please give the values for the following IP header fields in each IP fragments: Total Length, MF and Offset. Note: Assume IPV4 is used. There is no option field in IP header, i.e., the size of IP header is 20 Bytes. The size of UDP header is 8 Bytes. All numbers are in decimal.
- Suppose Host A sends two consecutive TCP segments to Host B over a TCP connection. The sequence number of the first segment is 748, and the sequence number of the second one is 995. Determine the size of the payload carried by the first segment. Suppose that the first segment is lost but the second segment arrives at host B. What will be the acknowledgment number of the acknowledgment segment that Host B sends to Host A?Assume that when establishing a TCP connection, the threshold for the Congestion Window (cwnd) is 1& segments. The congestion control algorithm is TCP Reno. In the oth round, a time out occurs.The ACK packets are then received correctly until the 1 Pth round. In this round, a triple duplicate ack occurs. Then until the 1Sth round, the ack packets are received correctly. Show these steps by plotting (the vertical axis is the congestion window capacity (cwnd) and the horizontal axis is the round number). Also specify the threshold value change each time it occurs. Graph the chart in any software you want and upload the fileThe first of these packets is from your computer to the DHCP server telling it to release the lease on your IP address. The next 4 packets renew that lease. Note that the source address on the “DHCP Discover” and “DHCP Request” packets is 0.0.0.0. This indicates that your computer does not actually use its new IP address until the interchange has completed. Also note that the destination address in each of the 4 packets is a broadcast address[1]. It should be obvious to you why the first two packets are broadcasted, but what about the last two? Can you explain this? Answer the questions in your Word document right after you post a snapshot of the DHCP packet screen. (#4)
- What is the required parameter to use while redistributing a route into EIGRP? A number of different elements, such as the exit interface and the IP address of the following hop, might have an effect on administrative distance.If a host has received the following segments in TCP:[1, 1000], [4001, 5000], [5001, 6000], [1, 1000]. (1)Show the contents of SACK option to be sent.TCP sends a segment at 5:30:20. it receives the acknowledgement at 5:30:25. What is the new value of RTT if the previous value of RTT was 4 seconds. Assume alpha is 0.8