1. India - Pakisthan Border
The India and Pakistan Border, known locally as the International Border (IB), is an international border running between India and Pakistan that demarcates the Indian states and the four provinces of Pakistan.
The border runs from the Line of Control (LoC), which separates the Indian controlled Kashmir from Pakistan controlled Kashmir, in the north, to Wagah, which partitioned the Indian Punjab state and Punjab Province of Pakistan, in the east.
The Zero Point separates the Indian states of Gujarat and Rajasthan to Sindh province of Pakistan, in the south.
2. India - China Border
Sovereignty over two large and various smaller separated pieces of territory have been contested between China and India.
The westernmost, Aksai Chin, is claimed by India as part of the state of Jammu and Kashmir and region of Ladakh but is controlled and administered as part of the Chinese autonomous region of Xinjiang. It is a virtually uninhabited high altitude wasteland crossed by the Xinjiang-Tibet Highway.
The other large disputed territory, the easternmost, lies south of the McMahon Line. It was formerly referred to as the North East Frontier Agency, and is now called Arunachal Pradesh. The McMahon Line was part of the 1914 Simla Convention between British India and Tibet, an agreement rejected by China.
3. India - Nepal Border
Modern-day India and Nepal initiated their relationship with the 1950 Indo-Nepal Treaty of Peace and Friendship and accompanying secret letters that defined security relations between the two countries, and an agreement governing both bilateral trade and trade transiting Indian territory.
The 1950 treaty and letters exchanged between the then Indian government and Rana rulers of Nepal, stated that "neither government shall tolerate any threat to the security of the other by a foreign aggressor" and obligated both sides "to inform each other of any serious friction or misunderstanding with any neighbouring state likely to cause any breach in the friendly relations subsisting between the two governments."
4. India - Myanmar Border
The India–Myanmar border barrier that India is constructing to seal its 1,624-kilometer (1,009 mi)-long border with Burma. India hopes to curtail cross-border crime, including goods, arms and counterfeit Indian currency smuggling, drug trafficking, and insurgency.
The United Nations Drug Control Programme (UNDCP) and International Narcotics Control Board (INCB) also warned about the poor state of border security facilities stating that the region could become a major transit point for illicit drugs.
5. India - Bangladesh Border
The Bangladesh–India border known locally as the International Border (IB), is an international border running between Bangladesh and India that demarcates the six divisions of Bangladesh and the Indian states.
Bangladesh and India share a 4,096-kilometer (2,545-mile)-long international border, the fifth-longest land border in the world, including 262 km in Assam, 856 km in Tripura, 180 km in Mizoram, 443 km in Meghalaya, and 2,217 km in West Bengal.
6. India - Bhutan Border
The Bhutan-India Border is the international boundary between the Kingdom of Bhutan and the Republic of India. The border is 699 km long, and adjoins the Indian states of Assam (267 km), Arunachal Pradesh (217 km), West Bengal (183 km), and Sikkim (32 km).
The Treaty of Peace between Britain and Bhutan demarcated the border in 1865, following the Bhutan War. The boundary was further detailed and refined in the 1973-1984 period through talks between Bhutan and India. Remaining disputes have been minor and concern part of the border with Arunachal Pradesh, and the region between Sarbhang and Geylegphug
7. India - Sri Lanka Border
The Republic of India and the Democratic Socialist Republic of Sri Lanka are neighbouring countries located in the continent of Asia. Both the nations share friendly bilateral relations and lie close to each other. The countries do not have any land borders but are separated by marine borders. Palk Strait, a strait between Tamil Nadu of India and the Mannar district of Northern Province of Sri Lanka, separates the two nations.
8. India - Afghanistan Border
Officially India does share a small stretch of border with Afghanistan, however that is in Kashmir which is occupied by Pakistan, currently. Historically Afghans do come to India for trade it was an old trade root which has died out to a great extent now but it is still there.