ccna3 - kopia
In which order, starting from most preferred to least preferred will break the tie of what will become the router ID in OSPF.
Router ID, Highest IP address on Loopback, Highest IP address
* Refer to the exhibit. What will be router C FD and AD (or RD this is the same thing) if it calculates all routes in the table?
* Which route will become the successor?
* Will router C have a backup route? If that's the case, which route will become the backup route?
Router B kommer att vara the successor eftersom den har den lägsta metric (FD), och Router D kommer att vara backup successor eftersom den har näst lägsta metric. I denna topologi kan du se att Router D och E har samma "FD" men olika "AD", och när AD är mindre än successors FD kommer den att vara backup.
Router B FD = 3 AD = 1
Router D FD = 4 AD = 2
Router E FD = 4 AD = 3
Which Multicast address Will OSPF use in a none DR/BDR network?
224.0.0.5
Successor (S)
The route with lowest metric to reach a destination.
Feasible Successor (FS)
A backup route that can be used immediately if the
Feasible Distance (FD)
The metric of the best route to reach a destination.
Reported Distance (RD)
The metric advertised by a neighbor for a specific route.
Successor Route
The route selected as the primary route to reach a destination.
Feasibility Condition
A condition that must be met for a route to be considered a feasible successor.
What happens if a packet traversing into a router does not match any ACE in the inbound ACL?
It is dropped because of the implicit deny statement in the end
RIP ad?
120
Static ad?
1
Internal EIGRP ad?
90
Connected ad?
0
ospf ad?
110
External EIGRP ad?
170
What address and prefix length is used when configuring an IPv6 default static route?
::/0
What does the abbreviation LLDP stand for?
Link Layer Discovery Protocol
vad är pat
PAT = Kallas även NAT overload och är en utökning av traditionellt NAT som tillåter flera privata IP adresser att mappas till a single public IP-adress genom att använda olika ports.
vad är dynamik NAT
NAT → Network Address Translation och det är att man översätter privata ip adresser till globala ip adresser.
vad är static NAT
Static NAT = Även känt som one-to-one NAT, det innebär att en enda privat IP-adress permanent mappas till en enda (a single) offentlig adress.
A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem?
The computer has an invalid default gateway address.
If a router has two interfaces and is routing both IPv4 and IPv6, how many ACLs could totally be applied to the router.
8 (en acl lista per port och per ip)
What is the correct command to use to apply an IPv6 ACL called ACL_SSH inbound on a vty line.
Router(config-line)#ipv6 access-class ACL_SSH in
When and why is the passive-interface command used?
The passive-interface command is used to prevent routing updates on specific interfaces for security and traffic efficiency.
Why is Feasible Condition a requirement for a router to become a Feasible Successor?
To avoid routing loops.
What metric does EIGRP use per default?
Bandwidth + Delay
Which IPsec security function provides assurance that the data received via a VPN has not been modified in transit?
Integrity.
Which network scenario will require the use of a WAN?
Employees need to connect to the corporate email server through a VPN while traveling.
What is a characteristic for Type 1 Hypervisors?
Also called the “bare metal” approach because the hypervisor is installed directly on the hardware.
What does API stand for?
Application program interface