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10+ IBM Network Engineer Interview Questions and Answers

Updated 5 Feb 2024

Q1. what you should see in the show interface type/member/module/number?

Ans.

The show interface command displays the status and statistics of a network interface.

  • Displays the interface type, member, module, and number

  • Shows the current status of the interface (up or down)

  • Displays the number of packets transmitted and received

  • Shows the number of errors and discards

  • Displays the speed and duplex settings of the interface

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Q2. What's the ad value of bgp and bgp States?

Ans.

BGP (Border Gateway Protocol) is a routing protocol used in internet networks. It provides scalability, redundancy, and policy control.

  • BGP is used to exchange routing information between different autonomous systems (AS)

  • It allows for efficient routing decisions based on policies and network conditions

  • BGP states represent the different stages of establishing and maintaining BGP peering sessions

  • Examples of BGP states include Idle, Connect, Active, OpenSent, OpenConfirm, Establi...read more

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Q3. What is the range of private ip address?

Ans.

The range of private IP addresses is defined by three blocks: 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.

  • Private IP addresses are used within private networks and are not routable on the internet.

  • The three blocks of private IP addresses are reserved for use in local area networks (LANs) and are not unique globally.

  • Private IP addresses allow organizations to have multiple devices with the same IP addresses within their private ...read more

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Q4. What is DNS,DHCP,IP address,RJ-45?

Ans.

DNS is a system that translates domain names into IP addresses. DHCP is a protocol for assigning IP addresses. IP address is a unique identifier for devices. RJ-45 is a type of connector used for Ethernet cables.

  • DNS translates domain names (e.g., www.example.com) into IP addresses (e.g., 192.168.1.1).

  • DHCP is a protocol that automatically assigns IP addresses to devices on a network.

  • An IP address is a numerical label assigned to each device connected to a computer network.

  • RJ-4...read more

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Q5. How many host will be in /29?

Ans.

A /29 subnet has 6 usable host addresses.

  • A /29 subnet has a subnet mask of 255.255.255.248.

  • The subnet mask leaves 3 bits for host addresses.

  • 2^3 = 8, but 2 addresses are reserved for network and broadcast.

  • Therefore, a /29 subnet has 6 usable host addresses.

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Q6. Types of network?

Ans.

There are several types of networks, including LAN, WAN, MAN, WLAN, and PAN.

  • Local Area Network (LAN) is a network that covers a small area, such as an office or a building.

  • Wide Area Network (WAN) is a network that covers a large geographical area, such as multiple cities or countries.

  • Metropolitan Area Network (MAN) is a network that covers a larger area than a LAN but smaller than a WAN, typically within a city.

  • Wireless Local Area Network (WLAN) is a LAN that uses wireless co...read more

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Q7. Which technologies I've worked on.

Ans.

I have worked on a variety of technologies as a Network Engineer.

  • Cisco networking equipment

  • Routing and switching protocols (e.g. OSPF, BGP)

  • Firewalls and security appliances (e.g. Cisco ASA, Palo Alto)

  • Network monitoring and management tools (e.g. SolarWinds, Wireshark)

  • Virtualization technologies (e.g. VMware, Hyper-V)

  • Load balancers (e.g. F5, Citrix NetScaler)

  • Wireless networking (e.g. Cisco Meraki, Aruba)

  • Network troubleshooting and performance optimization

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Q8. What's is hsrp?

Ans.

HSRP stands for Hot Standby Router Protocol. It is a Cisco proprietary protocol used to provide redundancy for IP networks.

  • HSRP is used to create a virtual IP address that can be shared by multiple routers in a network.

  • It allows for automatic failover in case the primary router fails.

  • HSRP routers elect an active router and standby routers, with the active router handling traffic while the standby routers are ready to take over if needed.

  • It uses a virtual MAC address and a vir...read more

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Q9. What's is VTP?

Ans.

VTP stands for VLAN Trunking Protocol. It is a Cisco proprietary protocol used to manage VLAN configurations across a network.

  • VTP allows for centralized management of VLANs in a network.

  • It enables the creation, deletion, and renaming of VLANs on a switch and automatically propagates these changes to other switches in the network.

  • VTP operates in three modes: server, client, and transparent.

  • Server mode allows VLAN configuration changes, client mode receives and stores VLAN info...read more

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Q10. What is mpls?

Ans.

MPLS (Multiprotocol Label Switching) is a protocol used in telecommunications networks to efficiently route data packets.

  • MPLS is a layer 2.5 protocol that operates between traditional layer 2 (Data Link Layer) and layer 3 (Network Layer) protocols.

  • It uses labels to identify and forward data packets, improving network performance and scalability.

  • MPLS can be used to create virtual private networks (VPNs) and prioritize traffic based on quality of service (QoS).

  • Example: In an MP...read more

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Q11. Types of ospf LSA

Ans.

OSPF LSA types include Router LSA, Network LSA, Summary LSA, ASBR Summary LSA, AS External LSA, and NSSA External LSA.

  • Router LSA describes the state of the router and its interfaces within an area.

  • Network LSA describes the state of the network segment and its attached routers.

  • Summary LSA summarizes routes from one area to another.

  • ASBR Summary LSA summarizes routes to an Autonomous System Boundary Router (ASBR).

  • AS External LSA advertises routes from other Autonomous Systems.

  • NS...read more

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Interview Process at IBM Network Engineer

based on 4 interviews
1 Interview rounds
Technical Round
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