What is the administrative distance for each routing protocol below.?

• RIP

• RIPv2

administrative distance is120

• IGRP

• EIGRP

administrative distance is90

• OSPF

administrative distance is110

• ISIS

administrative distance is115

• BGP

administrative distance is200

RIP-120,IGRP-100,EIGRP-90,OSPF-110

• RIP -----------  120

• RIPv2

• IGRP --------100

• IEGRP ------90

• OSPF --------110

• ISIS ------115

• BG ----- Internal BG -----200 and External BG----20

120=RIP

120= RIPv2

100= IGRP

90= EIGRP

110= OSPF

115= ISIS

IBGP and EBGP= BGP

IBGP=200

EBGP=20

 RIP -120

 RIPv2 -120

 IGRP-100

 IEGRP-90

 OSPF -110

 ISIS -115

 BGP -200

Cisco Routers support many dynamic routing protocols for learning routes in a complex network topology. The routing protocols supported are the following:

• RIP
• OSPF
• BGP
• IS-IS
• IGRP
• EIGRP

Each routing protocol has its own Administrative Distance (AD), which is a value representing the trustworthiness of the specific routing protocol. If a router learns a destination route from two or more routing protocols, it selects the route from the protocol having the smallest Administrative Distance.

The table below shows the default AD values for each routing protocol:

Routing Protocol

AD Value

200

Now, if the router learns a specific destination route from both OSPF and RIP, it will select the route learned from OSPF because this protocol has a smaller AD compared to RIP (110 instead of120).

well the question is great and many people here answered correctly, but this vary from one vendor to another since here we are talking about cisco yeah it's correct but for juniper for an example the administrative distance is called the default preference and it is different from cisco A.D for example the static routes in juniper takes a vaule of5 while in cisco the AD of static is1. not to mention these values can be tweaked and tuned.

RIPV1 RIPV2 RIPng ===>120

OSPF OSPFV3 ========>110

IGRP ==========>100

EIGPR (internal) ===>90 and EIGRP (External) ===>170 and EIGRP (Summery route) ==>5

ISIS ====>115

BGP (internal) ===>200 BGP (External) ==>20

RIP-RIPV2=120

IGRP=100

EIGRP=90/170

OSPF=110

IS-IS=115

BGP=200/20

RIP120

RIPv2 same as RIP

IGRP100

EIGRP(not IEGRP)90

OSPF110

IS-IS (ISIS scares :) )115

BGP200

• RIP ---------------------->120

• RIPv2 ------------------> 

• IGRP-------------------->100

• IEGRP------------------>90

• OSPF ------------------>110

• ISIS -------------------->115

• BGP ------------------->200