10+ SNF Group Interview Questions and Answers

OSPF is a link-state routing protocol while EIGRP is a distance-vector routing protocol.

• OSPF uses Dijkstra algorithm to calculate the shortest path while EIGRP uses Diffusing Update Algorithm (DUAL)

• OSPF supports VLSM and CIDR while EIGRP does not

• OSPF is an open standard protocol while EIGRP is Cisco proprietary

• OSPF has a lower administrative distance (110) compared to EIGRP (90)

The OSI (Open Systems Interconnection) model consists of 7 layers that define the functions of a network.

• Physical layer - deals with physical connections and signals (e.g. Ethernet cables)

• Data link layer - responsible for node-to-node communication (e.g. MAC addresses)

• Network layer - handles routing and forwarding of data packets (e.g. IP addresses)

• Transport layer - ensures end-to-end communication (e.g. TCP/UDP)

• Session layer - establishes, manages, and terminates connections...read more

Private IP address ranges are reserved for use within private networks and are not routable on the public internet.

• Private IP address ranges include 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255

• These addresses are commonly used in home, office, and corporate networks to allow devices to communicate with each other within the same network

• Private IP addresses are not unique globally and can be reused in different private networks w...read more

The types of BGP protocol include eBGP and iBGP.

• eBGP (External BGP) is used between different AS (Autonomous Systems)

• iBGP (Internal BGP) is used within the same AS

• eBGP is typically used for connecting to external networks, while iBGP is used for internal routing within the same network

Main mode and aggressive mode are two different negotiation strategies used in business and consulting.

• Main mode is a collaborative negotiation approach where parties work together to find mutually beneficial solutions.

• Aggressive mode is a competitive negotiation approach where one party seeks to maximize their own gains at the expense of the other party.

• Main mode focuses on building relationships and trust, while aggressive mode focuses on achieving specific outcomes regardl...read more

Next Generation Firewall (NGFW) is a network security system that integrates intrusion prevention, application awareness, and other advanced features.

• NGFW combines traditional firewall capabilities with advanced security features like application control, intrusion prevention, and SSL inspection.

• It provides deeper visibility into network traffic and more granular control over applications and users.

• NGFWs can identify and block sophisticated threats like advanced malware and z...read more

IPsec is a protocol suite for securing Internet Protocol (IP) communications. IKE is a key management protocol used with IPsec.

• IPsec stands for Internet Protocol Security and is used to secure IP communications.

• It provides authentication, encryption, and key management for network traffic.

• IKE (Internet Key Exchange) is a key management protocol used with IPsec to establish security associations and negotiate cryptographic keys.

• IKE ensures secure communication by authenticatin...read more

IPSec Parameters are settings used to configure and control the IPSec protocol for secure communication over a network.

• IPSec parameters include encryption algorithms such as AES, DES, and 3DES.

• Authentication methods like HMAC-SHA1, HMAC-MD5, and digital certificates are also part of IPSec parameters.

• Key exchange protocols such as IKEv1 and IKEv2 are used to establish secure communication channels.

• IPSec parameters also involve setting up security associations (SAs) for secure ...read more

RFC 1918 refers to a set of IP address ranges reserved for private networks.

• RFC 1918 defines three blocks of IP addresses that are reserved for private networks: 10.0.0.0 - 10.255.255.255, 172.16.0.0 - 172.31.255.255, and 192.168.0.0 - 192.168.255.255

• These private IP addresses are not routable on the public internet and are commonly used within organizations for internal networks

• Using RFC 1918 addresses helps prevent conflicts with public IP addresses and provides an addition...read more