RIPV 1
Flash Cards
Flash Cards
Wednesday, October 12, 2016
Friday, September 30, 2016
Firewall Modes on Cisco ASA
Which are the two modes of Cisco ASA firewall
Routed and Transparent
What is the default mode of Cisco ASA
Routed
Routed Mode
How ASA acts in routed mode
As a router hop in the network
What are the features of routed mode
- Support many interfaces
- Each interface requires an IP address
- Each interface belong to different subnet
Can we share interfaces between contexts
Yes
Which routing protocol supported in single context routed mode
OSPF, EIGRP and RIP
Which routing protocol supported in multiple context routed mode
Static routes only
Transparent firewall
Does transparent firewall acts a router hop in the network
No
What is transparent firewall
Layer 2 firewall
What are the other names for transparent firewall
Bump in the wire or stealth firewall
Does transparent firewall seen as a router hop in tht network
No
What are the features of transparent firewall
- Connect same network on inside and outside interface
- No need to configure IP address on interfaces
- Both interface belong to same subnet
What is the benefit of using transparent firewall
Easy to deploy into an existing network
EIGRP Operations
Which tables supported in EIGRP router
Support three tables
Neighbor table
Topology table
Routing table
EIGRP operation is based on these three tables
What information contained neighbor table
Set of neighbors with which EIGRP router has established
adjacencies
What is the command to display neighbor table
Show ip eigrp neighbor
How neighbor routers are characterized
By their primary IP address and the directly connected
interface that leads to them
What does topology table contain
All destination routes advertised by the neighbor routers
Each entry in topology table associated with a list of
neighbor that have advertised the destination
For each neighbor, an advertised metric is recorded in the
topology table
What is the command to display topology table
Show ip eigrp topology
What is routing table
Table has best routes to destination
What is the command to display routing table
Show ip route eigrp
1) The route with the best metric to the destination is called
the ______
Where successor or best path is placed
Routing table
Advertised to neighbor router
Neighbor process
R1 sends hello packets on all EIGRP enabled interfaces
R2 receive the hello packet on its interface
R2 reply with update packets
Update packets contain all routes from R2 routing table
Routes learned via split horizon not included into update
R2 send update packet to R1
Neighbor relationship is not established until R2 sends a
hello packet to R1
Update packet from R2 has initialization bit set
Indicate the initialization process
Update packet include routes and metric for each destination
Both R1 and R2 have exchanged hello packets
Neighbor adjacency is established
R1 replies to R2 with ACK packet
Indicate that update packet is received
R1 assimilates all the update packet in its topology table
R1 send update packet to R2
R2 send an ACK packet to R1
R1 and R2 successfully exchange update packets
R1 and R2 will update their routing tables with successor
routes from topology table
EIGRP Features
Which features are similar between IGRP and EIGRP
High speed convergence
Partial updates
Support multiple network layer protocols
What is the first step in configuring EIGRP
Establish EIGRP neighbor relationship
Which is the older version of EIGRP
IGRP
What are the features of EIGRP that distinguish from other
routing protocols
Fast convergence
Support variable length subnet masking VLSM
Partial updates
Support multiple network layer protocols
1) EIGRP is a _____ protocol
2) EIGRP combines the features of ____ and ______ routing protocols
3) EIGRP is a ______ routing protocol
What are the benefits of using EIGRP
Easy to configure
Adaptable to wide variety of network topologies
Dynamic neighbor discovery
Provide rapid convergence
Loop free topology
4) EIGRP is an _____ IGRP
Which algorithm used by EIGRP to achieve rapid convergence
DUAL diffusing update algorithm
5) A router running EIGRP stores its neighbors’______
What happen if there is no appropriate route in the local
routing table and no appropriate backup in the topology table
EIGRP send queries to its neighbors to discover an
alternative route
6) EIGRP sends_____ updates
Does EIGRP router send periodic updates
No
When updates are send by EIGRP router
When the path or the metric for a route change
Update contain information about only the changed link
rather the entire routing table
7) EIGRP consumes significantly ______ than IGRP
8) EIGRP supports IP Version 4 (IPv4) and IP Version 6 (IPv6)
using _______
9) For communication between routers, EIGRP uses ____ and _____ rather than broadcast
Which is the multicast address used by EIGRP
IPv4 is 224.0.0.10,
IPv6 is FF00::A
10) EIGRP is a ____ routing protocol
Which information is advertised for each destination
Subnet mask
Enables EIGRP to support discontinuous sub networks and VLSM
11) EIGRP represents metric values in a ______
12) EIGRP supports ______ load balancing
Why EIGRP uses RTP or reliable transfer protocol
For reliable exchange of information
What is the protocol number of EIGRP
88
What is reliable transport protocol
Acknowledgment require from the receiving router
Packet should be delivered in order
Include sequence number in the packet for ordered delivery
Which packets are delivered reliably or un-reliably
Updates require reliable delivery
Queries and Replies require reliable delivery
Hello packets does not require reliable delivery
Acknowledgment ACKs are hello packet with no data not
require reliable delivery
1) Cisco proprietary
2) Link state , distance vector
3) Distance vector
4) Enhanced
5) Routing tables
6) Partial triggered
7) Less bandwidth
8) Protocol-Dependent Modules
9) Multicast, Unicast
10) Classless
11) 32 bit format
12) Unequal Metric
Thursday, September 29, 2016
Multicast Addresses
| IP multicast address | Description |
| 224.0.0.4 | Distance Vector Multicast Routing Protocol (DVMRP) |
| 224.0.0.5 | OSPF |
| 224.0.0.6 | OSPF DR |
| 224.0.0.9 | The Routing Information Protocol (RIP) Version 2 |
| 224.0.0.10 | The Enhanced Interior Gateway Routing Protocol (EIGRP) |
| 224.0.0.13 | Protocol Independent Multicast (PIM) Version 2 |
| 224.0.0.18 | Virtual Router Redundancy Protocol (VRRP) |
| 224.0.0.19–21 | IS-IS over IP |
| 224.0.0.22 | Internet Group Management Protocol (IGMP) version 3[2] |
| 224.0.0.102 | Hot Standby Router Protocol version 2 (HSRPv2) / Gateway Load Balancing Protocol (GLBP) |
| 224.0.0.107 | Precision Time Protocol (PTP) version 2 |
| 224.0.0.251 | Multicast DNS (mDNS) address |
| 224.0.0.252 | Link-local Multicast Name Resolution (LLMNR) address |
| 224.0.1.41 | H.323 Gatekeeper discovery address |
| 239.255.255.250 | Simple Service Discovery Protocol address |
| 239.255.255.253 | Service Location Protocol version 2 address |
Types of Traffic
1) Routing protocols use different ______to control how
routing information is exchanged
Which are the different types of traffic
Unicast
Multicast
Anycast
Broadcast
What is unicast traffic
One to one context
Exchanged only between one sender and one receiver
What is multicast traffic
Identify a group of interfaces
Traffic sent to multiple destinations at the same time
Interface may belong to any number of multicast group
What is the reserved address space for multicast
IPV4 224.0.0.0–239.255.255.255
IPV6 has prefix FF00::/8
What is anycast
Network addressing and routing methodology
Traffic send from a single sender to topologically nearest
node in a group
All receivers are identified by same destination address
What is broadcast traffic
Traffic send to all devices in the subnet
Traffic send by one sender to all connected receivers
Local broadcast address 255.255.255.255
Used for communicating with all devices in the local network
2) IPv6 does not use a ____, but uses ___ addresses
3) Any cast addressing uses a ___ association
4) Broadcast addressing uses a ____ association
5) Multicast addressing uses a ____ association
6) Unicast addressing uses a ___ association
1) traffic types
2) broadcast address, multicast
3) one-to-nearest
4) one-to-many
5) one-to-unique many
6) one-to-one
Types of Routing Protocols
Which are the different types of routing protocol
Distance Vector
Link state
Path vector
How routing protocols are classified
Based on kind information about network reachability is
exchanged between the routers
Distance Vector protocol
What is distance vector protocol
Determines direction (vector) and distance (link cost or
number of hops) to any links in the network
How distance vector uses router
As a signpost
What does signpost indicates
Direction ad distance
Give no direction about the type of path
Which information routers know about remote network in
distance vector protocol
Distance or metric to reach the network
Path or interface to reach there
1) Distance vector routing protocols do not have an ____ of the network topology
How updates are shared in distance vector protocol
RIPV1 and IGRP send update periodically
EIGRP and RIPV2 uses triggered update
Link State protocols
Which algorithm use by link state protocol
Shortest Path First
2) A link-state routing protocol is like having a _____ of the network topology
How map is used by link state protocols
Determine the best path
3) All link-state routers have an _____ of the
network
Which information used by link state protocol to create
topology map and to select best path to all destination network
Link state information
Which are the types of link state protocol
OSPF and IS-IS
Path Vector Protocol
What information is exchanged by path vector routers
Information about the existence of destination networks
Exchanges the path on how to reach the destination
4) _______ is used to determine the best paths and
to prevent routing loops
5) Path vector protocols do not have an ___of the
network topology
6) Path vector protocols use ____ indicating direction
and distance
Which is the type of path vector protocol
BGP
1) actual map
2) complete map
3) identical “map”
4) Path information
5) abstract
6) signposts
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