A label-edged router (LER) is a PE router. A PE router is a provider edge router, which is a router that connects an MPLS network to a customer network. A LER is a term used in MPLS to describe a router that resides at the ingress and egress points of an MPLS network, handling both labelled and unlabelled packets. A LER performs label operations such as adding, removing, or swapping labels on packets entering or leaving the MPLS network34.
References: What is Label Edge Router (LER)? - Definition from Techopedia, LER - Label Edge Router - Mpirical
Question 17
Which network is reserved as a private network according to RFC1918?
According to RFC1918, there are three network blocks reserved as private networks that are not allocated to any specific organization and are not routable on the public Internet. These are:
10.0.0.0/8 (10.0.0.0 - 10.255.255.255)
172.16.0.0/12 (172.16.0.0 - 172.31.255.255)
192.168.0.0/16 (192.168.0.0 - 192.168.255.255)
Out of these, only option B (10.254.1.0/24) falls within one of the private network blocks (10.0.0.0/8). Option A (172.16.1.0/9) is not valid because it exceeds the /12 prefix length of the private network block (172.16.0.0/12). Option C (193.168.1.0/24) is not valid because it does not belong to any of the private network blocks, and is actually assigned to RIPE NCC as a public network block . Option D (172.15.1.0/24) is also not valid because it does not belong to any of the private network blocks, and is actually assigned to ARIN as a public network block . References: RFC 1918: Address Allocation for Private Internets, Private network - Wikipedia, [RIPE NCC IPv4 Address Space Chart], [ARIN WHOIS Database Search]
Question 18
Which statement is true about LDP?
Options:
A.
LDP and IGP both exchange their databases every 60 seconds.
B.
LDP and IGP both exchange their databases every 30 seconds.
C.
LDP relies on IGP for all routing-related decisions.
LDP relies on IGP for all routing-related decisions. LDP is a protocol that distributes labels in an MPLS environment, but it does not perform any routing functions. LDP uses the underlying routing information provided by an IGP, such as OSPF or IS-IS, to forward label packets. LDP and IGP do not exchange their databases at regular intervals, but rather use hello messages to maintain adjacencies and sessions. References: Ericsson IP Networking - Routing Protocols, Label Distribution Protocol - Wikipedia
Atlas
What are these Dumps? Would anybody please explain it to me.
ReignSep 9, 2026
These are exam dumps for a variety of IT certifications. They have a vast collection of updated questions and answers, which are very helpful in preparing for the exams.
Madeleine
Passed my exam with my dream score…. Guys do give these dumps a try. They are authentic.
ZiggySep 26, 2026
That's really impressive. I think I might give Cramkey Dumps a try for my next certification exam.
Ayra
How these dumps are necessary for passing the certification exam?
DamianSep 15, 2026
They give you a competitive edge and help you prepare better.
Sam
Can I get help from these dumps and their support team for preparing my exam?
AudreySep 25, 2026
Definitely, you won't regret it. They've helped so many people pass their exams and I'm sure they'll help you too. Good luck with your studies!
Peyton
Hey guys. Guess what? I passed my exam. Thanks a lot Cramkey, your provided information was relevant and reliable.
CobySep 15, 2026
Thanks for sharing your experience. I think I'll give Cramkey a try for my next exam.
