Deck 3: Routing Protocols Flashcards
Which of the following answers refers to a cloud computing service model in which clients, instead of buying all the hardware and software, purchase computing resources as an outsourced service from suppliers who own and maintain all the necessary equipment and software?
IaaS.
Which cloud service model would provide the best solution for a web developer intending to create a web app?
PaaS.
A DevOps practice that replaces manual configuration of hardware with automatic deployment through code is called?
IaC.
Which of the terms listed below refers to a cloud computing feature that allows consumers to control the volume and type of utilized computing resources?
On-Demand self-service.
Which of the following answers refers to a software or hardware that monitors network traffic and depending on the configuration settings applied to each data packet either blocks it or allows it to pass through?
Firewall (not packet filter).
What is OSPF?
OSPF is Open Shortest Path First, is a link-state routing protocol. It is an Interior Gateway Protocol that gathers information from available routers and constructs a topology map.
What is the Interior Gateway Protocol?
IGP is a routing protocol used within an autonomous system of a larger network. Unlike the EGP (Exterior Gateway Protocol) that manages routing between different systems, IGPs are designed for interior network routing efficiency.
One of the oldest IGPs is RIP (distance-vector routing). RIP uses hop count with a maximum of 15.
A more advanced OSPF is IGP that uses link-state routing algorithms.
What are autonomous systems?
AS is a large network or group of networks that has a unified routing policy. Every computer or device that connects to the Internet is connected to an AS. An AS is assigned an official number or ASN that it uses to communicate with other AS’ and routers via the BGP.
What is EGP?
Exterior Gateway Protocol is a protocol developed in the early 1980s and used to exchange routing information between gateways belonging to the same or different AS. It was eventually replaced by BGP. It relies soley on network reachability and does not consider metrics for calculating the best path.
What is BGP?
Border Gateway Protocol is a standardized EGP designed to exchange routing and reachability information among AS’ on the Internet. It is the routing protocol of the global Internet and Service Provider private networks. It is a path-vector routing protocol and makes routing decisions based on paths, network policies or configured rule sets.
RIP is?
Routing Information Protocol is a dynamic, distance-vector routing protocol that uses hop count as a metric to find the best path between source and destination. It has an AD (administrative distance) value of 120 and works on the Network layer of the OSI model. It uses port 520. It prevents loops by having a maximum hop count of 15 (16 is considered unreachable).
Difference between distance vector and path vector routing protocols?
Distance-vector routing protocols are based on the concept of distance and hop count as the primary metrics for determining the best path. The most common distance-vector routing protocol is RIP. Path-vector routing protocols use AS path length. In path-vector routing protocols, each router maintains a table of the AS path length (the number of AS’ the data must pass through to reach its destination). The most common path-vector routing protocol is BGP.
What is EIGRP?
Enhanced Interior Gateway Routing Protocol is a distance-vector protocol used in network for automating routing decisions and configuration. It is a Cisco proprietary tool, and is used by routers to share routes with other routers within the same AS. Unlike other protocols such as RIP, EIGRP only sends incremental updates.
Examples of distance-vector routing protocols include?
RIP.
EIGRP.
Border Gateway Protocol (BGP) falls into the category of?
Hybrid routing protocols.