EMEA-Advanced-Support Exam Dumps : Fortinet EMEA Advanced Support Exam

The TCP MSS (Maximum Segment Size) defines the maximum TCP payload size, excluding headers. When the firewall sets MSS to 1450 bytes, the TCP segment size is limited to this value. For IP packets, the total size includes the TCP header (20 bytes) and IP header (20 bytes), so 1450 (MSS) + 20 (TCP) + 20 (IP) = 1490 bytes, which fits within both link MTUs (1500 and 1496 bytes). Thus, the maximum IP packet size is not limited by the link MTUs but by the MSS, adjusted for headers. Options C and F (bits) are incorrect units; A and B exceed the MSS limit. Exact extract: "The TCP MSS is adjusted to prevent fragmentation... FortiGate can rewrite the MSS in TCP SYN packets to ensure the total IP packet size (including IP and TCP headers) does not exceed the configured value."

TCP is a unicast, connection-oriented protocol that ensures reliable data delivery between two endpoints using sequence numbers and acknowledgments. Multicast, which sends data to multiple recipients, is supported by UDP, not TCP, due to TCP’s requirement for a direct connection. Fortinet devices handle multicast traffic via UDP-based protocols like IGMP or PIM. Exact extract: "TCP is a unicast protocol that establishes a reliable connection between two devices... Multicast traffic, such as streaming or group communications, relies on UDP, as TCP does not support multicast delivery."

In OSPF, the Area Border Router (ABR) generates Type-4 Summary LSAs to advertise the location of an Autonomous System Boundary Router (ASBR) to other areas. This LSA informs routers in different areas how to reach the ASBR for external routes. ASBR generates Type-5 LSAs for external routes, but ABR summarizes them with Type-4. Not all routers or stub routers do this. Exact extract: This article describes the basic steps to configure FortiGates in an OSPF scenario where the FortiGates will be ABR and ASBR OSPF routers across 3 areas. Router3 is the Autonomous System Border Router (ASBR). It routes all traffic to the ISP BGP router for internet access. It redistributes routes from BGP and ... Type 4 LSAs exist to let the area know the router-id of the ASBR, so the routers can look at the type 5 route, find advertising-router, and map ... An ASBR summary LSA is generated by an ABR and describes the location of an ASBR (Autonomous System Boundary Router) that connects to an external network. The FortiGate in the middle shall be a ABR between the two areas. But I don't want R2 in area 0.0.0.0 to have every /32 route for every VPN client. So I tried ...