Correct! You can’t apparate into or out of Hogwarts. The ancient wards on the school have prevented this since its founding. The Floo network, on the other hand, works just fine, as has been demonstrated several times in HP:MoR and in canon. The Hogwarts wards can also be easily bypassed by the vanishing cabinet, phoenix teleportation, or portkeys. In HP:MoR, the use of portkeys can be blocked by wards like the ones on Azkaban (and presumably a handful of other ultra-high-security places, like Nurmengard).
While we’re on the subject of easily-exploitable security holes, Harry J. P. E. Verres might find these interesting:
House-elf apparition uses a different mechanism that effortlessly bypasses anti-apparition jinxes, such as (canonically) the ones in the Malfoy manor’s cellar-cum-dungeon.
If it’s possible to make small portable portkeys that can be activated on a whim, as Quirrell and Santa Claus have both shown themselves able to do, then this offers an excellent escape method from areas under anti-apparition jinxes, and Harry should definitely carry one at all times. Having such a panic button available could save his life. Unauthorized portkeys are very illegal, but this does not seem to be effectively enforced.
Easy, secure information transmission is possible by using the protean charm to link small items together. This is apparently a fairly difficult charm, but it may well be just a matter of skill, and therefore something that a sufficiently determined young genius can learn quickly. This is faster than using a Patronus to carry messages, less conspicuous, and can be used to broadcast information. Canonically, this was used by people on both sides of the Second Wizarding War.
You could’t apparate to Hogward in cannon, if I recall correctly?
Correct! You can’t apparate into or out of Hogwarts. The ancient wards on the school have prevented this since its founding. The Floo network, on the other hand, works just fine, as has been demonstrated several times in HP:MoR and in canon. The Hogwarts wards can also be easily bypassed by the vanishing cabinet, phoenix teleportation, or portkeys. In HP:MoR, the use of portkeys can be blocked by wards like the ones on Azkaban (and presumably a handful of other ultra-high-security places, like Nurmengard).
While we’re on the subject of easily-exploitable security holes, Harry J. P. E. Verres might find these interesting:
House-elf apparition uses a different mechanism that effortlessly bypasses anti-apparition jinxes, such as (canonically) the ones in the Malfoy manor’s cellar-cum-dungeon.
If it’s possible to make small portable portkeys that can be activated on a whim, as Quirrell and Santa Claus have both shown themselves able to do, then this offers an excellent escape method from areas under anti-apparition jinxes, and Harry should definitely carry one at all times. Having such a panic button available could save his life. Unauthorized portkeys are very illegal, but this does not seem to be effectively enforced.
Easy, secure information transmission is possible by using the protean charm to link small items together. This is apparently a fairly difficult charm, but it may well be just a matter of skill, and therefore something that a sufficiently determined young genius can learn quickly. This is faster than using a Patronus to carry messages, less conspicuous, and can be used to broadcast information. Canonically, this was used by people on both sides of the Second Wizarding War.