TF Something better about TCP than UDP: reliability. true TF Something better about TCP than UDP: more efficient. false TF It is within the range of normal for the same TCP ACK to be sent twice. true TF TCP sequence numbers are initiated at random as a security precaution (to make guessing the correct contents of a packet or response more difficult). true TF An ethernet header is optional and can be skipped for increased efficiency. false TF Website https certificates should normally be signed and issued by a reputable certificate authority. true TF The internet was originally used in a setting of relatively high trust between entities using the internet. true