Abstract: Provided are a network backup device and a network system. The network backup device includes a first connector configured to connect with one or more ports of a first network equipment, a second connector configured to connect with one or more second network equipment, a third connector configured to connect with a third network equipment, a switching module configured to aggregate data transmitted from the second connector, transfer the aggregated data to the third connector, and distribute data transmitted from the third connector to the second connector, and a switch configured to, in response to a fault occurring in a port of the first network equipment, switch from a connection between the second connector and the faulty port of the first network equipment to a connection between the second connector and the switching module.

Abstract: The invention relates to a novel strain, Lactobacillus fermentum strain, and a use thereof. Specifically, novel Lactobacillus fermentum PL9988, novel Lactobacillus fermentum PL9037, novel Lactobacillus fermentum PL9038, novel Lactobacillus fermentum PL9039 and novel Lactobacillus fermentum PL9040 strains, isolated from adults in a longevity village, and culture fluids thereof: have no antibiotic resistance transfer; have excellent intestinal cell adhesiveness, acid resistance and bile resistance; inhibit harmful pathogenic organisms in intestines; and have an immunity-enhancing effect, an endotoxin shock suppression effect and an antioxidant effect. In particular, Lactobacillus fermentum PL9988 strain significantly satisfies all of the above-mentioned conditions as a probiotic, and thus can be effectively used as a probiotic for intestinal health and defecation improvement and enhancement, or as a health food.

Abstract: Provided are an electronic patch device, network system, and operation method in the network system. The network system includes n (n is a natural number equal to or greater than 1) network equipments, a backup network equipment used for backing up one of the n network equipments, n terminals connected to the n network equipments respectively, and a distributor connecting respective lines between the n network equipments and the n terminals and replacing one of the n network equipments with the backup network equipment according to necessity. Here, a plurality of the distributors are connected in parallel.

Abstract: Provided are a network backup device and a network system. The network backup device includes a first connector configured to connect with one or more ports of a first network equipment, a second connector configured to connect with one or more second network equipment, a third connector configured to connect with a third network equipment, a switching module configured to aggregate data transmitted from the second connector, transfer the aggregated data to the third connector, and distribute data transmitted from the third connector to the second connector, and a switch configured to, in response to a fault occurring in a port of the first network equipment, switch from a connection between the second connector and the faulty port of the first network equipment to a connection between the second connector and the switching module.

Abstract: Provided are an electronic patch device, network system, and operation method in the network system. The network system includes n (n is a natural number equal to or greater than 1) network equipments, a backup network equipment used for backing up one of the n network equipments, n terminals connected to the n network equipments respectively, and a distributor connecting respective lines between the n network equipments and the n terminals and replacing one of the n network equipments with the backup network equipment according to necessity. Here, a plurality of the distributors are connected in parallel.