1 | Page
JUNIPER NETWORKS CERTIFIED
PROFESSIONAL – ENTERPRISE ROUTING
AND SWITCHING (JNCIP-ENT) PRACTICE
EXAM 2026/2027 QUESTIONS WITH
VERIFIED ANSWERS & COMPLETE
RATIONALES
**1. A network engineer is implementing OSPFv2 in an
enterprise environment. Which algorithm does OSPF use to
calculate the best path to a destination network?**
A. Distance vector algorithm
B. Link-state algorithm
C. Path vector algorithm
D. Hybrid algorithm
**Correct answer:** B
**Rationale:** OSPF is a link-state routing protocol that uses
the Dijkstra Shortest Path First (SPF) algorithm to compute the
shortest path tree. Distance vector protocols like RIP use
Bellman-Ford, while BGP uses a path vector algorithm .
---
,2 | Page
**2. In an OSPF network, what is the default adjacency type on
a point-to-point IS-IS link?**
A. Broadcast adjacency
B. Point-to-multipoint adjacency
C. Point-to-point adjacency
D. Non-broadcast multi-access (NBMA) adjacency
**Correct answer:** C
**Rationale:** Point-to-point links form a direct adjacency
without Designated Router (DR) or Backup Designated Router
(BDR) election. This is a fundamental characteristic of point-to-
point interfaces in both OSPF and IS-IS .
---
**3. Which BGP attribute is evaluated FIRST in the BGP best-
path selection algorithm?**
A. Local Preference
B. AS-Path length
C. Weight
D. MED
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**Correct answer:** C
**Rationale:** Weight is a Cisco-specific attribute and is
considered before any other attribute in the BGP decision
process. Higher weight values are preferred. Note that in
Juniper, the equivalent is the Local Preference attribute, but
Weight is evaluated first when present .
---
**4. A BGP router receives two routes to the same prefix with
identical attributes except that one has a MED of 100 and the
other has a MED of 200. Which route will be selected?**
A. The route with MED 100
B. The route with MED 200
C. The route with the lower AS-Path length
D. The route with the higher Local Preference
**Correct answer:** A
**Rationale:** Lower MED values are preferred; therefore the
route with MED 100 is selected. Multi-Exit Discriminator (MED)
is used to influence inbound traffic from neighboring
autonomous systems .
JUNIPER NETWORKS CERTIFIED
PROFESSIONAL – ENTERPRISE ROUTING
AND SWITCHING (JNCIP-ENT) PRACTICE
EXAM 2026/2027 QUESTIONS WITH
VERIFIED ANSWERS & COMPLETE
RATIONALES
**1. A network engineer is implementing OSPFv2 in an
enterprise environment. Which algorithm does OSPF use to
calculate the best path to a destination network?**
A. Distance vector algorithm
B. Link-state algorithm
C. Path vector algorithm
D. Hybrid algorithm
**Correct answer:** B
**Rationale:** OSPF is a link-state routing protocol that uses
the Dijkstra Shortest Path First (SPF) algorithm to compute the
shortest path tree. Distance vector protocols like RIP use
Bellman-Ford, while BGP uses a path vector algorithm .
---
,2 | Page
**2. In an OSPF network, what is the default adjacency type on
a point-to-point IS-IS link?**
A. Broadcast adjacency
B. Point-to-multipoint adjacency
C. Point-to-point adjacency
D. Non-broadcast multi-access (NBMA) adjacency
**Correct answer:** C
**Rationale:** Point-to-point links form a direct adjacency
without Designated Router (DR) or Backup Designated Router
(BDR) election. This is a fundamental characteristic of point-to-
point interfaces in both OSPF and IS-IS .
---
**3. Which BGP attribute is evaluated FIRST in the BGP best-
path selection algorithm?**
A. Local Preference
B. AS-Path length
C. Weight
D. MED
, 3 | Page
**Correct answer:** C
**Rationale:** Weight is a Cisco-specific attribute and is
considered before any other attribute in the BGP decision
process. Higher weight values are preferred. Note that in
Juniper, the equivalent is the Local Preference attribute, but
Weight is evaluated first when present .
---
**4. A BGP router receives two routes to the same prefix with
identical attributes except that one has a MED of 100 and the
other has a MED of 200. Which route will be selected?**
A. The route with MED 100
B. The route with MED 200
C. The route with the lower AS-Path length
D. The route with the higher Local Preference
**Correct answer:** A
**Rationale:** Lower MED values are preferred; therefore the
route with MED 100 is selected. Multi-Exit Discriminator (MED)
is used to influence inbound traffic from neighboring
autonomous systems .
