1: | How does the router determine whether it has received an iBGP or an eBGP update? -
The router is configured to iBGP or eBGP; it cannot determine between the two. -
The iBGP updates are not propagated; a received update must be from eBGP. -
The router sees whether the received update has routes in the IGP routing table. -
The router checks the autonomous system number in the open message that was sent. |
2: | Which of the following is true of iBGP neighbors? -
iBGP does not require neighbors to be physically adjacent. -
iBGP requires the neighbors to be physically adjacent. -
iBGP neighbors must share the same IP subnet address. -
iBGP neighbors must be used on a broadcast medium. |
3: | When is it possible to turn off the default synchronization? -
When confederations are used -
When route reflectors are configured -
When the iBGP neighbors are fully meshed -
When all the routers in the autonomous system are running iBGP |
4: | Why is it necessary to have a fully meshed iBGP network? -
No updates are propagated by other clients . -
It is not possible to redistribute between the IGP and BGP. -
To prevent routing loops . -
BGP treats routing within the autonomous system as if it were an NBMA network. |
5: | Which of the following is true of route reflectors? -
Route reflectors disallow the forwarding of attributes. -
Route reflectors prevent the need for a fully meshed eBGP network. -
Route reflectors are used to reflect routes to all neighbors. -
Route reflectors forward routing updates to neighbors or within the autonomous system. |
6: | Which of the following is true of a route reflector client? -
A client is a router that sends updates to the route reflector to be forwarded to other clients. -
A client is a router that receives updates from a route reflector. -
A client is a router that is configured and acts as a stub router. -
A client is a router that receives routes from an IGP. |
7: | Select the statement that is true. -
The routing table for IP contains the selected BGP path and the attributes. -
BGP uses the command clear ip bgp * to clear the IP routing table. -
By default, BGP does not store prefixes before policy application. -
BGP sends incremental updates every 15 minutes. |
8: | Which of the following fields are shown in the show ip bgp neighbors command? -
Neighbors -
The prefixes associated with each neighbor -
State of the BGP connections -
The last time a message was read from a neighbor |
9: | What command is used to display the route reflector clients? -
show ip ibgp neighbors -
show ip bgp neighbor -
show ip bgp route -
show ip route reflector |
10: | Which of the following filtering techniques can be used to filter on prefixes? -
AS_Path lists -
Distribute lists -
Access lists -
Prefix lists |
11: | When using a prefix list, what is the match criterion used? -
The first match -
The attribute name -
The match between ge and le -
All matches |
12: | Which command is used to configure a prefix list? -
ip bgp prefix list -
ip prefix-list -
access-list (200-299) -
bgp prefix list (200-299) |
13: | What are the most common forms of multihoming? -
ISPs send default routes into the autonomous system. -
Complete routing tables are sent into the IGP. -
Default and some selected routes are sent by the ISP into the autonomous system. -
All routes known by ISP are sent into the autonomous system. |
14: | In the command show ip bgp , the origin field is placed at the end of each line in the table. It can be which of the following values? -
Entry originated from IGP and was advertised with a network router configuration command. -
Entry originated from an EGP. -
Origin of the path is not clear. Usually, this is a router that is redistributed into BGP from an IGP. -
The IP address of the originating router. |
15: | Which command shows the local preference and weight attribute values? -
show bgp attributes -
show ip bgp -
show ip bgp path -
show ip bgp attributes |
16: | Give the command that would change the weight attribute for the path to the next hop 192.10.5.3. -
set weight 192.10.5.3 48 -
neighbor 192.10.5.3 weight 48 -
set attribute weight 48 -
ip bgp neighbor 192.10.0.0 remote-as 300 weight 48 |
17: | Which are the ways to advertise routes into BGP? -
They are automatically redistributed -
The network command -
Redistribute static routes -
Redistribute dynamically learned routes from the IGP |
18: | What is the concern when advertising routes from BGP into an IGP? -
BGP will receive too many routes and increase the size of the Internet routing tables. -
Private addresses will be propagated into the Internet. -
Routing loops will occur. -
The IGP will be overwhelmed. |