What layer of the OSI model would you assume the problem is in if you type show interface serial 1 and receive the following message? "Serial1 is down, line protocol is down."
| 1. | What layer of the OSI model would you assume the problem is in if you type show interface serial 1 and receive the following message? "Serial1 is down, line protocol is down." |
|||||||
Answer: Option A Explanation: If you see that a serial interface and the protocol are both down, then you have a Physical layer problem. If you see serial1 is up, line protocol is down, then you are not receiving (Data Link) keepalives from the remote end. |
Leave a Comment
Computer Science & Engineering :: Networking Questions and Answers : More Exercises
- Networking Basics - Networking Basics
- TCP/IP - TCP/IP
- IOS and Security Device Manager - IOS and Security Device Manager
- IP Routing - IP Routing
- Spanning Tree Protocol - Spanning Tree Protocol
- Security - Security
- Wireless Technologies - Wireless Technologies
- Wide Area Networks - Wide Area Networks
- Internetworking - Internetworking
- Subnetting - Subnetting
- Managing a Cisco Internetwork - Managing a Cisco Internetwork
- EIGRP and OSPF - EIGRP and OSPF
- Virtual LANs - Virtual LANs
- Network Address Translation - Network Address Translation
- IPv6 - IPv6