The Blues are heavy favourites to defeat their non-league opponents, sitting 57 places higher in the football pyramid.
Pompey are fourth in League One while the the Linnets are 13th in the National League standings.
But Kenny Jackett will treat his side's opponents with as much respect as any other team they’d face.
The Pompey boss has admitted he’ll be fielding a strong side in a bid to reach the third round for a third successive season.
However, he did admit he could give some players who he feels need a breather a rest ahead of a long trip to Blackpool on Tuesday.
We’ve predicted the Blues’ starting line-up and bench to face King’s Lynn...
5. Left-back - Cam Pring
With Lee Brown just returning from injury, he too could be given a breather. Pring's forays down the flank could prove important against a non-league side who'll likely make it tough for Pompey to breach. Photo: Joe Pepler
6. Right-midfield - Ryan Williams
Returned from a groin setback when he came off the bench against Oxford. This seems an ideal game for the Aussie to be handed a start as he works back towards full fitness. Photo: Graham Hunt
7. Centre-midfield - Tom Naylor
There could be temptation to rest the skipper but he's battle hardened as they come and rarely misses a beat when fit. Photo: Joe Pepler
8. Centre-midfield - Bryn Morris
Andy Cannon's been in fine form, but his high-octane approach could see him given a breather. Morris came on against Oxford and having both him and Tom Naylor in the engine room would allow both full-backs more of a licence to get forward. Photo: Joe Pepler