Ccna certification Practice Tests

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 45.  B.  The holddown timer’s job is to allow the network to stabilize after a route had become 

unreachable via an update. This limits the potential problems related to a flapping port 

and allows RIPv2 to converge route updates in the entire network. The default holddown 

timer is set to 180 seconds. The flush timer defines the time between when the route 

becomes invalid and it is flushed or deleted from the route table. The default flush timer 

is set to 240 seconds. The invalid timer defines when a route is declared invalid. The 

default invalid timer is set to 180 seconds. The update timer is the timer that defines how 

often multicasts are sent with the complete route table. When the update is multicast to 

all listening neighbors, the route table will be populated with the new entries. The default 

update timer is set to 30 seconds.

 46.  C.  The ARP request took time for the ARP reply, and during this time, the ICMP timeout 

threshold was exceeded. This is common on a router, and the following pings should not 

time out unless the ARP entry is cleared after its TTL expires. The local router will not 

drop the first packet, mainly because routers don’t normally drop traffic unless instructed 

to do so. Although the route table could be updating at that moment, it is not probable 

because this behavior can be replicated. The remote router, like the local router, will not 

normally drop packets unless instructed to do so.

 47.  A.  The command 

network 203.244.234.0 will advertise the 203.244.234.0 network. 

When you’re configuring RIP, only the network address needs to be configured with 

the 

network command. The command network 203.244.234.0 255.255.255.0 

is incorrect. The command 

network 203.244.234.0 0.0.0.255 is incorrect. The 

command 

network 203.244.234.0/24 is incorrect.

 48.  C.  In the exhibit, packets are being sent to the router via a trunk link. A setup where the 

packets for VLANs are sent to a router for routing between VLANs is called router on 

a stick (ROAS) routing. Default routing, also known as stub routing, is normally used 

on stub networks, where all networks are available through the gateway of last resort. 

Switched virtual interface (SVI) routing is performed on layer 3 switches. A virtual 

interface is created that will have an IP address and routing capabilities.

 49.  D.  When you want to turn on the layer 3 functionality of a switch, you must configure the 

command 

ip routing in global configuration. This is required when you want to create 

Switched Virtual Interfaces (SVIs) for VLANs and want to route on the switch between 

the VLANs. This method of routing is much more efficient, since the traffic is routed 

in the ASICs on the switch. The command 

ip route svi is incorrect. The command 

feature svi routing is incorrect. The command svi routing is incorrect.

 50.  C.  The entries with the dash in the Age column represent the physical interfaces of the 

router. If the entries were configured statically, their type would reflect a status of 

static. 

Entries that have just been added to the ARP table will have an initial timer set. All entries 

in the ARP table will be displayed with their remaining time in seconds. Therefore, any 

entry with less than a minute left before it expires will be under 60 seconds.

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