What it means: The Giants wanted to see how they measured up to an NFC contender. When it was over, the Giants reminded everyone who the defending Super Bowl champions are and how good this team can be when it is motivated and healthy.
The Giants made a statement by dominating the Niners on their own turf. The defense came up with its best performance of the season, suffocating the Niners' offense. Eli Manning and the offensive line were sensational. The Giants moved the offense against perhaps the best defense in the NFL.
More importantly, this is the kind of win that can propel the Giants to a solid winning streak. The Giants have won two straight and will roll into two critical division games with a ton of momentum.
The ball hawk: The Giants got the sacks they wanted, but they also collected something even better –- three rare interceptions of Alex Smith.
Smith came into this game having thrown just one interception on the season. But Prince Amukamara picked off a pass in the first half and Antrel Rolle intercepted Smith twice in the third quarter, helping to set up two Giants field goals.
Rolle said last year that he often was not put in position to be the ball hawk that he wants to be. He certainly harassed Smith on Sunday.
No Vernon: Vernon Davis scored three touchdowns against the Giants in two games last season. On Sunday, he was invisible when the game was on the line. He made just two catches for 13 yards in the first three quarters.
O-line: The Giants' offensive line felt as if it had something to prove after giving up six sacks and 12 official quarterback hits to the Niners defense in the NFC title game. This time, Manning's jersey was kept clean and Ahmad Bradshaw broke the 100-yard barrier for the second straight Sunday, this time against an elite run defense.
Cruz caught a Manning bullet over the middle in the back of the end zone and delivered his patented salsa celebration. Rogers initially said he might mimic the salsa again if he made a play. But after finding out that Cruz dedicated the salsa to his late grandmother, Rogers said he wouldn't do it.
Diehl comes off bench: David Diehl was active for the first time since Sept. 16 when he injured his MCL against Tampa Bay.
He came in as the extra blocker. The Giants opted to keep Sean Locklear at right tackle and Will Beatty at left tackle with the offensive line doing well. Diehl had started all 142 regular-season games he played in for the Giants.
Special-teams miscues: The Giants had a field goal blocked near the end of the first half, but the Niners helped the Giants' cause with two missed field goals. David Akers missed from 43 and 52 yards.
What's next: The Giants get their first taste of Robert Griffin III next Sunday at home. At 0-2 in the division, the Giants need an NFC East victory.